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Finding the Fourth Proportional to 66,465,715.80, 99,698,573.70 and 40,935,552.60

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Solution

The fourth proportional to 66,465,715.80, 99,698,573.70 and 40,935,552.60 is: 61,403,328.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465,715.80 : 99,698,573.70 = 40,935,552.60 : x
  2. Step 2: Convert to fraction form
    66,465,715.80/99,698,573.70 = 40,935,552.60/x
  3. Step 3: Cross multiply
    66,465,715.80x = 99,698,573.70 × 40,935,552.60
  4. Step 4: Simplify right side
    66,465,715.80x = 4,081,216,207,841,327
  5. Step 5: Solve for x
    x = 4,081,216,207,841,327/66,465,715.80
  6. Step 6: Final answer
    x = 61,403,328.90

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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.