Home / 76,781.60-115,237.20-34,726.40

Finding the Fourth Proportional to 76,781.60, 115,237.20 and 34,726.40

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Solution

The fourth proportional to 76,781.60, 115,237.20 and 34,726.40 is: 52,118.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,781.60 : 115,237.20 = 34,726.40 : x
  2. Step 2: Convert to fraction form
    76,781.60/115,237.20 = 34,726.40/x
  3. Step 3: Cross multiply
    76,781.60x = 115,237.20 × 34,726.40
  4. Step 4: Simplify right side
    76,781.60x = 4,001,773,102.08
  5. Step 5: Solve for x
    x = 4,001,773,102.08/76,781.60
  6. Step 6: Final answer
    x = 52,118.91

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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.