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Finding the Fourth Proportional to 78,580.48, 108,479.51 and 52,729.78

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Solution

The fourth proportional to 78,580.48, 108,479.51 and 52,729.78 is: 72,792.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,580.48 : 108,479.51 = 52,729.78 : x
  2. Step 2: Convert to fraction form
    78,580.48/108,479.51 = 52,729.78/x
  3. Step 3: Cross multiply
    78,580.48x = 108,479.51 × 52,729.78
  4. Step 4: Simplify right side
    78,580.48x = 5,720,099,890.76
  5. Step 5: Solve for x
    x = 5,720,099,890.76/78,580.48
  6. Step 6: Final answer
    x = 72,792.89

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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.