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Finding the Fourth Proportional to 84,880.98, 127,319.18 and 28,720.71

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Solution

The fourth proportional to 84,880.98, 127,319.18 and 28,720.71 is: 43,080.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,880.98 : 127,319.18 = 28,720.71 : x
  2. Step 2: Convert to fraction form
    84,880.98/127,319.18 = 28,720.71/x
  3. Step 3: Cross multiply
    84,880.98x = 127,319.18 × 28,720.71
  4. Step 4: Simplify right side
    84,880.98x = 3,656,697,102.61
  5. Step 5: Solve for x
    x = 3,656,697,102.61/84,880.98
  6. Step 6: Final answer
    x = 43,080.29

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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.