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Finding the Fourth Proportional to 66,543,986.04, 99,819,061.80 and 20,487,918

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Solution

The fourth proportional to 66,543,986.04, 99,819,061.80 and 20,487,918 is: 30,732,826.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,543,986.04 : 99,819,061.80 = 20,487,918 : x
  2. Step 2: Convert to fraction form
    66,543,986.04/99,819,061.80 = 20,487,918/x
  3. Step 3: Cross multiply
    66,543,986.04x = 99,819,061.80 × 20,487,918
  4. Step 4: Simplify right side
    66,543,986.04x = 2,045,084,752,995,332.25
  5. Step 5: Solve for x
    x = 2,045,084,752,995,332.25/66,543,986.04
  6. Step 6: Final answer
    x = 30,732,826.13

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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.