Home / 80,008,112.80-120,012,169.20-78,732,654.40

Finding the Fourth Proportional to 80,008,112.80, 120,012,169.20 and 78,732,654.40

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Solution

The fourth proportional to 80,008,112.80, 120,012,169.20 and 78,732,654.40 is: 118,098,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,008,112.80 : 120,012,169.20 = 78,732,654.40 : x
  2. Step 2: Convert to fraction form
    80,008,112.80/120,012,169.20 = 78,732,654.40/x
  3. Step 3: Cross multiply
    80,008,112.80x = 120,012,169.20 × 78,732,654.40
  4. Step 4: Simplify right side
    80,008,112.80x = 9,448,876,641,417,926
  5. Step 5: Solve for x
    x = 9,448,876,641,417,926/80,008,112.80
  6. Step 6: Final answer
    x = 118,098,981.60

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1.5x scale

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.