Home / 98,821.28-148,125.60-42,687.80

Finding the Fourth Proportional to 98,821.28, 148,125.60 and 42,687.80

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Solution

The fourth proportional to 98,821.28, 148,125.60 and 42,687.80 is: 63,985.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,821.28 : 148,125.60 = 42,687.80 : x
  2. Step 2: Convert to fraction form
    98,821.28/148,125.60 = 42,687.80/x
  3. Step 3: Cross multiply
    98,821.28x = 148,125.60 × 42,687.80
  4. Step 4: Simplify right side
    98,821.28x = 6,323,155,987.68
  5. Step 5: Solve for x
    x = 6,323,155,987.68/98,821.28
  6. Step 6: Final answer
    x = 63,985.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.