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Finding the Fourth Proportional to 84,920.10, 127,376.10 and 28,754.70

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Solution

The fourth proportional to 84,920.10, 127,376.10 and 28,754.70 is: 43,130.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,920.10 : 127,376.10 = 28,754.70 : x
  2. Step 2: Convert to fraction form
    84,920.10/127,376.10 = 28,754.70/x
  3. Step 3: Cross multiply
    84,920.10x = 127,376.10 × 28,754.70
  4. Step 4: Simplify right side
    84,920.10x = 3,662,661,542.67
  5. Step 5: Solve for x
    x = 3,662,661,542.67/84,920.10
  6. Step 6: Final answer
    x = 43,130.68

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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.