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Finding the Fourth Proportional to 66,437,912.80, 99,656,869.20 and 60,060,620.80

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Solution

The fourth proportional to 66,437,912.80, 99,656,869.20 and 60,060,620.80 is: 90,090,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,437,912.80 : 99,656,869.20 = 60,060,620.80 : x
  2. Step 2: Convert to fraction form
    66,437,912.80/99,656,869.20 = 60,060,620.80/x
  3. Step 3: Cross multiply
    66,437,912.80x = 99,656,869.20 × 60,060,620.80
  4. Step 4: Simplify right side
    66,437,912.80x = 5,985,453,431,136,399
  5. Step 5: Solve for x
    x = 5,985,453,431,136,399/66,437,912.80
  6. Step 6: Final answer
    x = 90,090,931.20

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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.