Home / 142,086.93-196,079.01-78,424.71

Finding the Fourth Proportional to 142,086.93, 196,079.01 and 78,424.71

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Solution

The fourth proportional to 142,086.93, 196,079.01 and 78,424.71 is: 108,225.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,086.93 : 196,079.01 = 78,424.71 : x
  2. Step 2: Convert to fraction form
    142,086.93/196,079.01 = 78,424.71/x
  3. Step 3: Cross multiply
    142,086.93x = 196,079.01 × 78,424.71
  4. Step 4: Simplify right side
    142,086.93x = 15,377,439,496.34
  5. Step 5: Solve for x
    x = 15,377,439,496.34/142,086.93
  6. Step 6: Final answer
    x = 108,225.57

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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.