Home / 109,878.49-151,581.08-71,128.85

Finding the Fourth Proportional to 109,878.49, 151,581.08 and 71,128.85

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Solution

The fourth proportional to 109,878.49, 151,581.08 and 71,128.85 is: 98,124.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,878.49 : 151,581.08 = 71,128.85 : x
  2. Step 2: Convert to fraction form
    109,878.49/151,581.08 = 71,128.85/x
  3. Step 3: Cross multiply
    109,878.49x = 151,581.08 × 71,128.85
  4. Step 4: Simplify right side
    109,878.49x = 10,781,787,902.16
  5. Step 5: Solve for x
    x = 10,781,787,902.16/109,878.49
  6. Step 6: Final answer
    x = 98,124.65

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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.