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Finding the Fourth Proportional to 84,920.86, 127,373.46 and 28,754.52

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Solution

The fourth proportional to 84,920.86, 127,373.46 and 28,754.52 is: 43,129.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,920.86 : 127,373.46 = 28,754.52 : x
  2. Step 2: Convert to fraction form
    84,920.86/127,373.46 = 28,754.52/x
  3. Step 3: Cross multiply
    84,920.86x = 127,373.46 × 28,754.52
  4. Step 4: Simplify right side
    84,920.86x = 3,662,562,703.04
  5. Step 5: Solve for x
    x = 3,662,562,703.04/84,920.86
  6. Step 6: Final answer
    x = 43,129.13

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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.