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Finding the Fourth Proportional to 121,305.84, 181,958.76 and 47,382

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Solution

The fourth proportional to 121,305.84, 181,958.76 and 47,382 is: 71,073

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,305.84 : 181,958.76 = 47,382 : x
  2. Step 2: Convert to fraction form
    121,305.84/181,958.76 = 47,382/x
  3. Step 3: Cross multiply
    121,305.84x = 181,958.76 × 47,382
  4. Step 4: Simplify right side
    121,305.84x = 8,621,569,966.32
  5. Step 5: Solve for x
    x = 8,621,569,966.32/121,305.84
  6. Step 6: Final answer
    x = 71,073

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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.