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Finding the Fourth Proportional to 10,602,203.20, 15,903,304.80 and 7,242,971.20

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Solution

The fourth proportional to 10,602,203.20, 15,903,304.80 and 7,242,971.20 is: 10,864,456.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,602,203.20 : 15,903,304.80 = 7,242,971.20 : x
  2. Step 2: Convert to fraction form
    10,602,203.20/15,903,304.80 = 7,242,971.20/x
  3. Step 3: Cross multiply
    10,602,203.20x = 15,903,304.80 × 7,242,971.20
  4. Step 4: Simplify right side
    10,602,203.20x = 115,187,178,651,221.77
  5. Step 5: Solve for x
    x = 115,187,178,651,221.77/10,602,203.20
  6. Step 6: Final answer
    x = 10,864,456.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.