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Finding the Fourth Proportional to 100,602,003.80, 150,903,005.70 and 69,991,002.20

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Solution

The fourth proportional to 100,602,003.80, 150,903,005.70 and 69,991,002.20 is: 104,986,503.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,602,003.80 : 150,903,005.70 = 69,991,002.20 : x
  2. Step 2: Convert to fraction form
    100,602,003.80/150,903,005.70 = 69,991,002.20/x
  3. Step 3: Cross multiply
    100,602,003.80x = 150,903,005.70 × 69,991,002.20
  4. Step 4: Simplify right side
    100,602,003.80x = 10,561,852,603,935,312
  5. Step 5: Solve for x
    x = 10,561,852,603,935,312/100,602,003.80
  6. Step 6: Final answer
    x = 104,986,503.30

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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.