Home / 78,732,158.80-118,098,238.20-39,990,109.90

Finding the Fourth Proportional to 78,732,158.80, 118,098,238.20 and 39,990,109.90

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Solution

The fourth proportional to 78,732,158.80, 118,098,238.20 and 39,990,109.90 is: 59,985,164.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,158.80 : 118,098,238.20 = 39,990,109.90 : x
  2. Step 2: Convert to fraction form
    78,732,158.80/118,098,238.20 = 39,990,109.90/x
  3. Step 3: Cross multiply
    78,732,158.80x = 118,098,238.20 × 39,990,109.90
  4. Step 4: Simplify right side
    78,732,158.80x = 4,722,761,524,614,378
  5. Step 5: Solve for x
    x = 4,722,761,524,614,378/78,732,158.80
  6. Step 6: Final answer
    x = 59,985,164.85

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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.