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Finding the Fourth Proportional to 72,188,079.80, 108,282,119.70 and 56,063,766.20

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Solution

The fourth proportional to 72,188,079.80, 108,282,119.70 and 56,063,766.20 is: 84,095,649.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,188,079.80 : 108,282,119.70 = 56,063,766.20 : x
  2. Step 2: Convert to fraction form
    72,188,079.80/108,282,119.70 = 56,063,766.20/x
  3. Step 3: Cross multiply
    72,188,079.80x = 108,282,119.70 × 56,063,766.20
  4. Step 4: Simplify right side
    72,188,079.80x = 6,070,703,442,501,215
  5. Step 5: Solve for x
    x = 6,070,703,442,501,215/72,188,079.80
  6. Step 6: Final answer
    x = 84,095,649.30

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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.