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Finding the Fourth Proportional to 131,874.66, 181,987.08 and 71,445.72

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Solution

The fourth proportional to 131,874.66, 181,987.08 and 71,445.72 is: 98,595.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,874.66 : 181,987.08 = 71,445.72 : x
  2. Step 2: Convert to fraction form
    131,874.66/181,987.08 = 71,445.72/x
  3. Step 3: Cross multiply
    131,874.66x = 181,987.08 × 71,445.72
  4. Step 4: Simplify right side
    131,874.66x = 13,002,197,961.30
  5. Step 5: Solve for x
    x = 13,002,197,961.30/131,874.66
  6. Step 6: Final answer
    x = 98,595.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.