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Finding the Fourth Proportional to 98,851.60, 147,931.80 and 90,557.20

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Solution

The fourth proportional to 98,851.60, 147,931.80 and 90,557.20 is: 135,519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,851.60 : 147,931.80 = 90,557.20 : x
  2. Step 2: Convert to fraction form
    98,851.60/147,931.80 = 90,557.20/x
  3. Step 3: Cross multiply
    98,851.60x = 147,931.80 × 90,557.20
  4. Step 4: Simplify right side
    98,851.60x = 13,396,289,598.96
  5. Step 5: Solve for x
    x = 13,396,289,598.96/98,851.60
  6. Step 6: Final answer
    x = 135,519.20

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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.