Home / 142,122.27-196,123.58-78,458.70

Finding the Fourth Proportional to 142,122.27, 196,123.58 and 78,458.70

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Solution

The fourth proportional to 142,122.27, 196,123.58 and 78,458.70 is: 108,270.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,122.27 : 196,123.58 = 78,458.70 : x
  2. Step 2: Convert to fraction form
    142,122.27/196,123.58 = 78,458.70/x
  3. Step 3: Cross multiply
    142,122.27x = 196,123.58 × 78,458.70
  4. Step 4: Simplify right side
    142,122.27x = 15,387,601,126.15
  5. Step 5: Solve for x
    x = 15,387,601,126.15/142,122.27
  6. Step 6: Final answer
    x = 108,270.16

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1.5x scale

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.