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Finding the Fourth Proportional to 158,872.78, 219,244.66 and 86,275.70

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Solution

The fourth proportional to 158,872.78, 219,244.66 and 86,275.70 is: 119,060.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,872.78 : 219,244.66 = 86,275.70 : x
  2. Step 2: Convert to fraction form
    158,872.78/219,244.66 = 86,275.70/x
  3. Step 3: Cross multiply
    158,872.78x = 219,244.66 × 86,275.70
  4. Step 4: Simplify right side
    158,872.78x = 18,915,485,746.29
  5. Step 5: Solve for x
    x = 18,915,485,746.29/158,872.78
  6. Step 6: Final answer
    x = 119,060.58

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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.