Home / 156,742.48-216,306.21-85,123.90

Finding the Fourth Proportional to 156,742.48, 216,306.21 and 85,123.90

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Solution

The fourth proportional to 156,742.48, 216,306.21 and 85,123.90 is: 117,471.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,742.48 : 216,306.21 = 85,123.90 : x
  2. Step 2: Convert to fraction form
    156,742.48/216,306.21 = 85,123.90/x
  3. Step 3: Cross multiply
    156,742.48x = 216,306.21 × 85,123.90
  4. Step 4: Simplify right side
    156,742.48x = 18,412,828,189.42
  5. Step 5: Solve for x
    x = 18,412,828,189.42/156,742.48
  6. Step 6: Final answer
    x = 117,471.84

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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.