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Finding the Fourth Proportional to 132,478.79, 182,867.67 and 78,763.55

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Solution

The fourth proportional to 132,478.79, 182,867.67 and 78,763.55 is: 108,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,478.79 : 182,867.67 = 78,763.55 : x
  2. Step 2: Convert to fraction form
    132,478.79/182,867.67 = 78,763.55/x
  3. Step 3: Cross multiply
    132,478.79x = 182,867.67 × 78,763.55
  4. Step 4: Simplify right side
    132,478.79x = 14,403,305,955.09
  5. Step 5: Solve for x
    x = 14,403,305,955.09/132,478.79
  6. Step 6: Final answer
    x = 108,721.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.