Home / 142,922.56-197,231.79-78,390.47

Finding the Fourth Proportional to 142,922.56, 197,231.79 and 78,390.47

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Solution

The fourth proportional to 142,922.56, 197,231.79 and 78,390.47 is: 108,178.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,922.56 : 197,231.79 = 78,390.47 : x
  2. Step 2: Convert to fraction form
    142,922.56/197,231.79 = 78,390.47/x
  3. Step 3: Cross multiply
    142,922.56x = 197,231.79 × 78,390.47
  4. Step 4: Simplify right side
    142,922.56x = 15,461,092,565.31
  5. Step 5: Solve for x
    x = 15,461,092,565.31/142,922.56
  6. Step 6: Final answer
    x = 108,178.11

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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.