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Finding the Fourth Proportional to 99,689.80, 149,616.30 and 98,912.20

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Solution

The fourth proportional to 99,689.80, 149,616.30 and 98,912.20 is: 148,449.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,689.80 : 149,616.30 = 98,912.20 : x
  2. Step 2: Convert to fraction form
    99,689.80/149,616.30 = 98,912.20/x
  3. Step 3: Cross multiply
    99,689.80x = 149,616.30 × 98,912.20
  4. Step 4: Simplify right side
    99,689.80x = 14,798,877,388.86
  5. Step 5: Solve for x
    x = 14,798,877,388.86/99,689.80
  6. Step 6: Final answer
    x = 148,449.26

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1.5x scale

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.