Home / 112,678.20-155,496.24-61,691.40

Finding the Fourth Proportional to 112,678.20, 155,496.24 and 61,691.40

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Solution

The fourth proportional to 112,678.20, 155,496.24 and 61,691.40 is: 85,134.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,678.20 : 155,496.24 = 61,691.40 : x
  2. Step 2: Convert to fraction form
    112,678.20/155,496.24 = 61,691.40/x
  3. Step 3: Cross multiply
    112,678.20x = 155,496.24 × 61,691.40
  4. Step 4: Simplify right side
    112,678.20x = 9,592,780,740.34
  5. Step 5: Solve for x
    x = 9,592,780,740.34/112,678.20
  6. Step 6: Final answer
    x = 85,134.31

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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.