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Finding the Fourth Proportional to 84,443.81, 126,665.84 and 21,263.95

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Solution

The fourth proportional to 84,443.81, 126,665.84 and 21,263.95 is: 31,895.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,443.81 : 126,665.84 = 21,263.95 : x
  2. Step 2: Convert to fraction form
    84,443.81/126,665.84 = 21,263.95/x
  3. Step 3: Cross multiply
    84,443.81x = 126,665.84 × 21,263.95
  4. Step 4: Simplify right side
    84,443.81x = 2,693,416,088.47
  5. Step 5: Solve for x
    x = 2,693,416,088.47/84,443.81
  6. Step 6: Final answer
    x = 31,895.96

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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.