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Finding the Fourth Proportional to 129,502,602.80, 194,253,904.20 and 65,005,348.40

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Solution

The fourth proportional to 129,502,602.80, 194,253,904.20 and 65,005,348.40 is: 97,508,022.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,502,602.80 : 194,253,904.20 = 65,005,348.40 : x
  2. Step 2: Convert to fraction form
    129,502,602.80/194,253,904.20 = 65,005,348.40/x
  3. Step 3: Cross multiply
    129,502,602.80x = 194,253,904.20 × 65,005,348.40
  4. Step 4: Simplify right side
    129,502,602.80x = 12,627,542,720,581,222
  5. Step 5: Solve for x
    x = 12,627,542,720,581,222/129,502,602.80
  6. Step 6: Final answer
    x = 97,508,022.60

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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.