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Finding the Fourth Proportional to 78,851.80, 118,277.70 and 72,400.60

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Solution

The fourth proportional to 78,851.80, 118,277.70 and 72,400.60 is: 108,600.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,851.80 : 118,277.70 = 72,400.60 : x
  2. Step 2: Convert to fraction form
    78,851.80/118,277.70 = 72,400.60/x
  3. Step 3: Cross multiply
    78,851.80x = 118,277.70 × 72,400.60
  4. Step 4: Simplify right side
    78,851.80x = 8,563,376,446.62
  5. Step 5: Solve for x
    x = 8,563,376,446.62/78,851.80
  6. Step 6: Final answer
    x = 108,600.90

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1.5x scale

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.