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Finding the Fourth Proportional to 158,478.26, 218,701.71 and 86,856.74

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Solution

The fourth proportional to 158,478.26, 218,701.71 and 86,856.74 is: 119,863.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,478.26 : 218,701.71 = 86,856.74 : x
  2. Step 2: Convert to fraction form
    158,478.26/218,701.71 = 86,856.74/x
  3. Step 3: Cross multiply
    158,478.26x = 218,701.71 × 86,856.74
  4. Step 4: Simplify right side
    158,478.26x = 18,995,717,563.03
  5. Step 5: Solve for x
    x = 18,995,717,563.03/158,478.26
  6. Step 6: Final answer
    x = 119,863.24

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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.