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Finding the Fourth Proportional to 84,687.19, 127,030.84 and 28,522.61

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Solution

The fourth proportional to 84,687.19, 127,030.84 and 28,522.61 is: 42,783.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,687.19 : 127,030.84 = 28,522.61 : x
  2. Step 2: Convert to fraction form
    84,687.19/127,030.84 = 28,522.61/x
  3. Step 3: Cross multiply
    84,687.19x = 127,030.84 × 28,522.61
  4. Step 4: Simplify right side
    84,687.19x = 3,623,251,107.29
  5. Step 5: Solve for x
    x = 3,623,251,107.29/84,687.19
  6. Step 6: Final answer
    x = 42,783.93

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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.