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Finding the Fourth Proportional to 84,720.16, 127,080.72 and 22,390

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Solution

The fourth proportional to 84,720.16, 127,080.72 and 22,390 is: 33,585.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,720.16 : 127,080.72 = 22,390 : x
  2. Step 2: Convert to fraction form
    84,720.16/127,080.72 = 22,390/x
  3. Step 3: Cross multiply
    84,720.16x = 127,080.72 × 22,390
  4. Step 4: Simplify right side
    84,720.16x = 2,845,337,320.80
  5. Step 5: Solve for x
    x = 2,845,337,320.80/84,720.16
  6. Step 6: Final answer
    x = 33,585.13

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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.