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Finding the Fourth Proportional to 99,762,542.80, 149,643,814.20 and 65,722,325.20

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Solution

The fourth proportional to 99,762,542.80, 149,643,814.20 and 65,722,325.20 is: 98,583,487.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,762,542.80 : 149,643,814.20 = 65,722,325.20 : x
  2. Step 2: Convert to fraction form
    99,762,542.80/149,643,814.20 = 65,722,325.20/x
  3. Step 3: Cross multiply
    99,762,542.80x = 149,643,814.20 × 65,722,325.20
  4. Step 4: Simplify right side
    99,762,542.80x = 9,834,939,421,020,778
  5. Step 5: Solve for x
    x = 9,834,939,421,020,778/99,762,542.80
  6. Step 6: Final answer
    x = 98,583,487.80

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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.