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Finding the Fourth Proportional to 84,990.62, 127,428.42 and 47,576.52

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Solution

The fourth proportional to 84,990.62, 127,428.42 and 47,576.52 is: 71,332.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,990.62 : 127,428.42 = 47,576.52 : x
  2. Step 2: Convert to fraction form
    84,990.62/127,428.42 = 47,576.52/x
  3. Step 3: Cross multiply
    84,990.62x = 127,428.42 × 47,576.52
  4. Step 4: Simplify right side
    84,990.62x = 6,062,599,897.67
  5. Step 5: Solve for x
    x = 6,062,599,897.67/84,990.62
  6. Step 6: Final answer
    x = 71,332.58

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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.