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Finding the Fourth Proportional to 158,532.59, 218,774.93 and 86,911.08

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Solution

The fourth proportional to 158,532.59, 218,774.93 and 86,911.08 is: 119,937.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,532.59 : 218,774.93 = 86,911.08 : x
  2. Step 2: Convert to fraction form
    158,532.59/218,774.93 = 86,911.08/x
  3. Step 3: Cross multiply
    158,532.59x = 218,774.93 × 86,911.08
  4. Step 4: Simplify right side
    158,532.59x = 19,013,964,188.26
  5. Step 5: Solve for x
    x = 19,013,964,188.26/158,532.59
  6. Step 6: Final answer
    x = 119,937.26

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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.