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Finding the Fourth Proportional to 78,711.60, 118,056.60 and 26,115.60

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Solution

The fourth proportional to 78,711.60, 118,056.60 and 26,115.60 is: 39,169.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,711.60 : 118,056.60 = 26,115.60 : x
  2. Step 2: Convert to fraction form
    78,711.60/118,056.60 = 26,115.60/x
  3. Step 3: Cross multiply
    78,711.60x = 118,056.60 × 26,115.60
  4. Step 4: Simplify right side
    78,711.60x = 3,083,118,942.96
  5. Step 5: Solve for x
    x = 3,083,118,942.96/78,711.60
  6. Step 6: Final answer
    x = 39,169.82

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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.