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Finding the Fourth Proportional to 69,251,205.80, 103,876,808.70 and 66,605,810.60

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Solution

The fourth proportional to 69,251,205.80, 103,876,808.70 and 66,605,810.60 is: 99,908,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,251,205.80 : 103,876,808.70 = 66,605,810.60 : x
  2. Step 2: Convert to fraction form
    69,251,205.80/103,876,808.70 = 66,605,810.60/x
  3. Step 3: Cross multiply
    69,251,205.80x = 103,876,808.70 × 66,605,810.60
  4. Step 4: Simplify right side
    69,251,205.80x = 6,918,799,046,004,633
  5. Step 5: Solve for x
    x = 6,918,799,046,004,633/69,251,205.80
  6. Step 6: Final answer
    x = 99,908,715.90

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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.