Home / 66,486.20-99,679.70-40,185.40

Finding the Fourth Proportional to 66,486.20, 99,679.70 and 40,185.40

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Solution

The fourth proportional to 66,486.20, 99,679.70 and 40,185.40 is: 60,248.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.20 : 99,679.70 = 40,185.40 : x
  2. Step 2: Convert to fraction form
    66,486.20/99,679.70 = 40,185.40/x
  3. Step 3: Cross multiply
    66,486.20x = 99,679.70 × 40,185.40
  4. Step 4: Simplify right side
    66,486.20x = 4,005,668,616.38
  5. Step 5: Solve for x
    x = 4,005,668,616.38/66,486.20
  6. Step 6: Final answer
    x = 60,248.12

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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.