Home / 142,531.29-196,690.41-78,869.55

Finding the Fourth Proportional to 142,531.29, 196,690.41 and 78,869.55

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Solution

The fourth proportional to 142,531.29, 196,690.41 and 78,869.55 is: 108,838.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,531.29 : 196,690.41 = 78,869.55 : x
  2. Step 2: Convert to fraction form
    142,531.29/196,690.41 = 78,869.55/x
  3. Step 3: Cross multiply
    142,531.29x = 196,690.41 × 78,869.55
  4. Step 4: Simplify right side
    142,531.29x = 15,512,884,126.02
  5. Step 5: Solve for x
    x = 15,512,884,126.02/142,531.29
  6. Step 6: Final answer
    x = 108,838.45

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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.