Home / 103,920.12-143,296.92-66,146.04

Finding the Fourth Proportional to 103,920.12, 143,296.92 and 66,146.04

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Solution

The fourth proportional to 103,920.12, 143,296.92 and 66,146.04 is: 91,209.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,920.12 : 143,296.92 = 66,146.04 : x
  2. Step 2: Convert to fraction form
    103,920.12/143,296.92 = 66,146.04/x
  3. Step 3: Cross multiply
    103,920.12x = 143,296.92 × 66,146.04
  4. Step 4: Simplify right side
    103,920.12x = 9,478,523,802.20
  5. Step 5: Solve for x
    x = 9,478,523,802.20/103,920.12
  6. Step 6: Final answer
    x = 91,209.71

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1.5x scale

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.