Home / 78,341.04-108,127.68-48,142.20

Finding the Fourth Proportional to 78,341.04, 108,127.68 and 48,142.20

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Solution

The fourth proportional to 78,341.04, 108,127.68 and 48,142.20 is: 66,446.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,341.04 : 108,127.68 = 48,142.20 : x
  2. Step 2: Convert to fraction form
    78,341.04/108,127.68 = 48,142.20/x
  3. Step 3: Cross multiply
    78,341.04x = 108,127.68 × 48,142.20
  4. Step 4: Simplify right side
    78,341.04x = 5,205,504,396.10
  5. Step 5: Solve for x
    x = 5,205,504,396.10/78,341.04
  6. Step 6: Final answer
    x = 66,446.71

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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.