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Finding the Fourth Proportional to 158,266.64, 218,410.71 and 86,645.54

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Solution

The fourth proportional to 158,266.64, 218,410.71 and 86,645.54 is: 119,572.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,266.64 : 218,410.71 = 86,645.54 : x
  2. Step 2: Convert to fraction form
    158,266.64/218,410.71 = 86,645.54/x
  3. Step 3: Cross multiply
    158,266.64x = 218,410.71 × 86,645.54
  4. Step 4: Simplify right side
    158,266.64x = 18,924,313,909.73
  5. Step 5: Solve for x
    x = 18,924,313,909.73/158,266.64
  6. Step 6: Final answer
    x = 119,572.35

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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.