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Finding the Fourth Proportional to 141,871.55, 195,784.05 and 78,211.62

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Solution

The fourth proportional to 141,871.55, 195,784.05 and 78,211.62 is: 107,932.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,871.55 : 195,784.05 = 78,211.62 : x
  2. Step 2: Convert to fraction form
    141,871.55/195,784.05 = 78,211.62/x
  3. Step 3: Cross multiply
    141,871.55x = 195,784.05 × 78,211.62
  4. Step 4: Simplify right side
    141,871.55x = 15,312,587,329.60
  5. Step 5: Solve for x
    x = 15,312,587,329.60/141,871.55
  6. Step 6: Final answer
    x = 107,932.76

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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.