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Finding the Fourth Proportional to 159,017, 219,434.18 and 87,397.08

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Solution

The fourth proportional to 159,017, 219,434.18 and 87,397.08 is: 120,602.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,017 : 219,434.18 = 87,397.08 : x
  2. Step 2: Convert to fraction form
    159,017/219,434.18 = 87,397.08/x
  3. Step 3: Cross multiply
    159,017x = 219,434.18 × 87,397.08
  4. Step 4: Simplify right side
    159,017x = 19,177,906,584.19
  5. Step 5: Solve for x
    x = 19,177,906,584.19/159,017
  6. Step 6: Final answer
    x = 120,602.87

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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.