Home / 78,732,128.80-118,098,193.20-72,035,972.20

Finding the Fourth Proportional to 78,732,128.80, 118,098,193.20 and 72,035,972.20

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Solution

The fourth proportional to 78,732,128.80, 118,098,193.20 and 72,035,972.20 is: 108,053,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,128.80 : 118,098,193.20 = 72,035,972.20 : x
  2. Step 2: Convert to fraction form
    78,732,128.80/118,098,193.20 = 72,035,972.20/x
  3. Step 3: Cross multiply
    78,732,128.80x = 118,098,193.20 × 72,035,972.20
  4. Step 4: Simplify right side
    78,732,128.80x = 8,507,318,162,225,430
  5. Step 5: Solve for x
    x = 8,507,318,162,225,430/78,732,128.80
  6. Step 6: Final answer
    x = 108,053,958.30

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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.