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Finding the Fourth Proportional to 78,684.55, 118,061.71 and 41,235.72

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Solution

The fourth proportional to 78,684.55, 118,061.71 and 41,235.72 is: 61,871.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,684.55 : 118,061.71 = 41,235.72 : x
  2. Step 2: Convert to fraction form
    78,684.55/118,061.71 = 41,235.72/x
  3. Step 3: Cross multiply
    78,684.55x = 118,061.71 × 41,235.72
  4. Step 4: Simplify right side
    78,684.55x = 4,868,358,922.88
  5. Step 5: Solve for x
    x = 4,868,358,922.88/78,684.55
  6. Step 6: Final answer
    x = 61,871.86

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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.