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Finding the Fourth Proportional to 158,654.40, 218,941.80 and 86,057.11

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Solution

The fourth proportional to 158,654.40, 218,941.80 and 86,057.11 is: 118,758.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,654.40 : 218,941.80 = 86,057.11 : x
  2. Step 2: Convert to fraction form
    158,654.40/218,941.80 = 86,057.11/x
  3. Step 3: Cross multiply
    158,654.40x = 218,941.80 × 86,057.11
  4. Step 4: Simplify right side
    158,654.40x = 18,841,499,617.01
  5. Step 5: Solve for x
    x = 18,841,499,617.01/158,654.40
  6. Step 6: Final answer
    x = 118,758.12

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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.