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Finding the Fourth Proportional to 117,987.66, 177,011.73 and 39,123.90

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Solution

The fourth proportional to 117,987.66, 177,011.73 and 39,123.90 is: 58,695.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,987.66 : 177,011.73 = 39,123.90 : x
  2. Step 2: Convert to fraction form
    117,987.66/177,011.73 = 39,123.90/x
  3. Step 3: Cross multiply
    117,987.66x = 177,011.73 × 39,123.90
  4. Step 4: Simplify right side
    117,987.66x = 6,925,389,223.35
  5. Step 5: Solve for x
    x = 6,925,389,223.35/117,987.66
  6. Step 6: Final answer
    x = 58,695.88

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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.