Home / 98,985.60-148,132.80-90,691.20

Finding the Fourth Proportional to 98,985.60, 148,132.80 and 90,691.20

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Solution

The fourth proportional to 98,985.60, 148,132.80 and 90,691.20 is: 135,720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,985.60 : 148,132.80 = 90,691.20 : x
  2. Step 2: Convert to fraction form
    98,985.60/148,132.80 = 90,691.20/x
  3. Step 3: Cross multiply
    98,985.60x = 148,132.80 × 90,691.20
  4. Step 4: Simplify right side
    98,985.60x = 13,434,341,391.36
  5. Step 5: Solve for x
    x = 13,434,341,391.36/98,985.60
  6. Step 6: Final answer
    x = 135,720.16

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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.