Home / 78,732,095.85-118,098,143.78-72,496,521.45

Finding the Fourth Proportional to 78,732,095.85, 118,098,143.78 and 72,496,521.45

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Solution

The fourth proportional to 78,732,095.85, 118,098,143.78 and 72,496,521.45 is: 108,744,782.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,095.85 : 118,098,143.78 = 72,496,521.45 : x
  2. Step 2: Convert to fraction form
    78,732,095.85/118,098,143.78 = 72,496,521.45/x
  3. Step 3: Cross multiply
    78,732,095.85x = 118,098,143.78 × 72,496,521.45
  4. Step 4: Simplify right side
    78,732,095.85x = 8,561,704,613,389,472
  5. Step 5: Solve for x
    x = 8,561,704,613,389,472/78,732,095.85
  6. Step 6: Final answer
    x = 108,744,782.18

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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.