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Finding the Fourth Proportional to 78,999.60, 118,515.60 and 26,446.80

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Solution

The fourth proportional to 78,999.60, 118,515.60 and 26,446.80 is: 39,675.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,999.60 : 118,515.60 = 26,446.80 : x
  2. Step 2: Convert to fraction form
    78,999.60/118,515.60 = 26,446.80/x
  3. Step 3: Cross multiply
    78,999.60x = 118,515.60 × 26,446.80
  4. Step 4: Simplify right side
    78,999.60x = 3,134,358,370.08
  5. Step 5: Solve for x
    x = 3,134,358,370.08/78,999.60
  6. Step 6: Final answer
    x = 39,675.62

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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.