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Finding the Fourth Proportional to 71,655,110.40, 107,496,662.40 and 28,516,972.80

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Solution

The fourth proportional to 71,655,110.40, 107,496,662.40 and 28,516,972.80 is: 42,781,029.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,655,110.40 : 107,496,662.40 = 28,516,972.80 : x
  2. Step 2: Convert to fraction form
    71,655,110.40/107,496,662.40 = 28,516,972.80/x
  3. Step 3: Cross multiply
    71,655,110.40x = 107,496,662.40 × 28,516,972.80
  4. Step 4: Simplify right side
    71,655,110.40x = 3,065,479,397,751,583
  5. Step 5: Solve for x
    x = 3,065,479,397,751,583/71,655,110.40
  6. Step 6: Final answer
    x = 42,781,029.58

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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.