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Finding the Fourth Proportional to 71,786,989.80, 107,680,484.70 and 26,342,879.40

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Solution

The fourth proportional to 71,786,989.80, 107,680,484.70 and 26,342,879.40 is: 39,514,319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,786,989.80 : 107,680,484.70 = 26,342,879.40 : x
  2. Step 2: Convert to fraction form
    71,786,989.80/107,680,484.70 = 26,342,879.40/x
  3. Step 3: Cross multiply
    71,786,989.80x = 107,680,484.70 × 26,342,879.40
  4. Step 4: Simplify right side
    71,786,989.80x = 2,836,614,022,185,645
  5. Step 5: Solve for x
    x = 2,836,614,022,185,645/71,786,989.80
  6. Step 6: Final answer
    x = 39,514,319.10

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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.