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Finding the Fourth Proportional to 158,516.64, 218,753.16 and 86,899.26

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Solution

The fourth proportional to 158,516.64, 218,753.16 and 86,899.26 is: 119,921.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,516.64 : 218,753.16 = 86,899.26 : x
  2. Step 2: Convert to fraction form
    158,516.64/218,753.16 = 86,899.26/x
  3. Step 3: Cross multiply
    158,516.64x = 218,753.16 × 86,899.26
  4. Step 4: Simplify right side
    158,516.64x = 19,009,487,726.66
  5. Step 5: Solve for x
    x = 19,009,487,726.66/158,516.64
  6. Step 6: Final answer
    x = 119,921.09

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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.