Home / 99,805.20-149,707.80-66,125.40

Finding the Fourth Proportional to 99,805.20, 149,707.80 and 66,125.40

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Solution

The fourth proportional to 99,805.20, 149,707.80 and 66,125.40 is: 99,188.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,805.20 : 149,707.80 = 66,125.40 : x
  2. Step 2: Convert to fraction form
    99,805.20/149,707.80 = 66,125.40/x
  3. Step 3: Cross multiply
    99,805.20x = 149,707.80 × 66,125.40
  4. Step 4: Simplify right side
    99,805.20x = 9,899,488,158.12
  5. Step 5: Solve for x
    x = 9,899,488,158.12/99,805.20
  6. Step 6: Final answer
    x = 99,188.10

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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.