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Finding the Fourth Proportional to 84,988.78, 127,484.48 and 21,807.56

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Solution

The fourth proportional to 84,988.78, 127,484.48 and 21,807.56 is: 32,711.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,988.78 : 127,484.48 = 21,807.56 : x
  2. Step 2: Convert to fraction form
    84,988.78/127,484.48 = 21,807.56/x
  3. Step 3: Cross multiply
    84,988.78x = 127,484.48 × 21,807.56
  4. Step 4: Simplify right side
    84,988.78x = 2,780,125,819.90
  5. Step 5: Solve for x
    x = 2,780,125,819.90/84,988.78
  6. Step 6: Final answer
    x = 32,711.68

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1.5x scale

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.