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Finding the Fourth Proportional to 99,820.30, 149,730.45 and 93,915.40

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Solution

The fourth proportional to 99,820.30, 149,730.45 and 93,915.40 is: 140,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,820.30 : 149,730.45 = 93,915.40 : x
  2. Step 2: Convert to fraction form
    99,820.30/149,730.45 = 93,915.40/x
  3. Step 3: Cross multiply
    99,820.30x = 149,730.45 × 93,915.40
  4. Step 4: Simplify right side
    99,820.30x = 14,061,995,103.93
  5. Step 5: Solve for x
    x = 14,061,995,103.93/99,820.30
  6. Step 6: Final answer
    x = 140,873.10

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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.