Home / 66,139.92-91,287.45-40,668.12

Finding the Fourth Proportional to 66,139.92, 91,287.45 and 40,668.12

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Solution

The fourth proportional to 66,139.92, 91,287.45 and 40,668.12 is: 56,130.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,139.92 : 91,287.45 = 40,668.12 : x
  2. Step 2: Convert to fraction form
    66,139.92/91,287.45 = 40,668.12/x
  3. Step 3: Cross multiply
    66,139.92x = 91,287.45 × 40,668.12
  4. Step 4: Simplify right side
    66,139.92x = 3,712,488,971.09
  5. Step 5: Solve for x
    x = 3,712,488,971.09/66,139.92
  6. Step 6: Final answer
    x = 56,130.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.