Home / 85,712.40-118,158.68-60,139.04

Finding the Fourth Proportional to 85,712.40, 118,158.68 and 60,139.04

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Solution

The fourth proportional to 85,712.40, 118,158.68 and 60,139.04 is: 82,904.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,712.40 : 118,158.68 = 60,139.04 : x
  2. Step 2: Convert to fraction form
    85,712.40/118,158.68 = 60,139.04/x
  3. Step 3: Cross multiply
    85,712.40x = 118,158.68 × 60,139.04
  4. Step 4: Simplify right side
    85,712.40x = 7,105,949,582.87
  5. Step 5: Solve for x
    x = 7,105,949,582.87/85,712.40
  6. Step 6: Final answer
    x = 82,904.57

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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.