Home / 142,330.96-196,416.76-78,668.76

Finding the Fourth Proportional to 142,330.96, 196,416.76 and 78,668.76

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Solution

The fourth proportional to 142,330.96, 196,416.76 and 78,668.76 is: 108,562.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,330.96 : 196,416.76 = 78,668.76 : x
  2. Step 2: Convert to fraction form
    142,330.96/196,416.76 = 78,668.76/x
  3. Step 3: Cross multiply
    142,330.96x = 196,416.76 × 78,668.76
  4. Step 4: Simplify right side
    142,330.96x = 15,451,862,952.42
  5. Step 5: Solve for x
    x = 15,451,862,952.42/142,330.96
  6. Step 6: Final answer
    x = 108,562.91

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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.