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Finding the Fourth Proportional to 112,839.52, 155,712.52 and 65,090.04

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Solution

The fourth proportional to 112,839.52, 155,712.52 and 65,090.04 is: 89,820.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,839.52 : 155,712.52 = 65,090.04 : x
  2. Step 2: Convert to fraction form
    112,839.52/155,712.52 = 65,090.04/x
  3. Step 3: Cross multiply
    112,839.52x = 155,712.52 × 65,090.04
  4. Step 4: Simplify right side
    112,839.52x = 10,135,334,155.30
  5. Step 5: Solve for x
    x = 10,135,334,155.30/112,839.52
  6. Step 6: Final answer
    x = 89,820.78

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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.