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Finding the Fourth Proportional to 128,003.60, 176,654.90 and 70,654.16

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Solution

The fourth proportional to 128,003.60, 176,654.90 and 70,654.16 is: 97,508.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,003.60 : 176,654.90 = 70,654.16 : x
  2. Step 2: Convert to fraction form
    128,003.60/176,654.90 = 70,654.16/x
  3. Step 3: Cross multiply
    128,003.60x = 176,654.90 × 70,654.16
  4. Step 4: Simplify right side
    128,003.60x = 12,481,403,569.38
  5. Step 5: Solve for x
    x = 12,481,403,569.38/128,003.60
  6. Step 6: Final answer
    x = 97,508.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.