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Finding the Fourth Proportional to 99,820.80, 149,731.20 and 93,915.90

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Solution

The fourth proportional to 99,820.80, 149,731.20 and 93,915.90 is: 140,873.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,820.80 : 149,731.20 = 93,915.90 : x
  2. Step 2: Convert to fraction form
    99,820.80/149,731.20 = 93,915.90/x
  3. Step 3: Cross multiply
    99,820.80x = 149,731.20 × 93,915.90
  4. Step 4: Simplify right side
    99,820.80x = 14,062,140,406.08
  5. Step 5: Solve for x
    x = 14,062,140,406.08/99,820.80
  6. Step 6: Final answer
    x = 140,873.85

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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.