Home / 142,122.77-196,124.27-78,459.20

Finding the Fourth Proportional to 142,122.77, 196,124.27 and 78,459.20

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Solution

The fourth proportional to 142,122.77, 196,124.27 and 78,459.20 is: 108,270.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,122.77 : 196,124.27 = 78,459.20 : x
  2. Step 2: Convert to fraction form
    142,122.77/196,124.27 = 78,459.20/x
  3. Step 3: Cross multiply
    142,122.77x = 196,124.27 × 78,459.20
  4. Step 4: Simplify right side
    142,122.77x = 15,387,753,324.78
  5. Step 5: Solve for x
    x = 15,387,753,324.78/142,122.77
  6. Step 6: Final answer
    x = 108,270.85

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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.