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Finding the Fourth Proportional to 99,690.95, 149,407.25 and 40,494.33

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Solution

The fourth proportional to 99,690.95, 149,407.25 and 40,494.33 is: 60,689.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,690.95 : 149,407.25 = 40,494.33 : x
  2. Step 2: Convert to fraction form
    99,690.95/149,407.25 = 40,494.33/x
  3. Step 3: Cross multiply
    99,690.95x = 149,407.25 × 40,494.33
  4. Step 4: Simplify right side
    99,690.95x = 6,050,145,738.86
  5. Step 5: Solve for x
    x = 6,050,145,738.86/99,690.95
  6. Step 6: Final answer
    x = 60,689.02

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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.