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Finding the Fourth Proportional to 84,885.72, 127,284.78 and 38,098.56

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Solution

The fourth proportional to 84,885.72, 127,284.78 and 38,098.56 is: 57,128.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,885.72 : 127,284.78 = 38,098.56 : x
  2. Step 2: Convert to fraction form
    84,885.72/127,284.78 = 38,098.56/x
  3. Step 3: Cross multiply
    84,885.72x = 127,284.78 × 38,098.56
  4. Step 4: Simplify right side
    84,885.72x = 4,849,366,827.92
  5. Step 5: Solve for x
    x = 4,849,366,827.92/84,885.72
  6. Step 6: Final answer
    x = 57,128.18

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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.