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Finding the Fourth Proportional to 60,780.96, 83,811.60 and 39,520.80

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Solution

The fourth proportional to 60,780.96, 83,811.60 and 39,520.80 is: 54,495.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,780.96 : 83,811.60 = 39,520.80 : x
  2. Step 2: Convert to fraction form
    60,780.96/83,811.60 = 39,520.80/x
  3. Step 3: Cross multiply
    60,780.96x = 83,811.60 × 39,520.80
  4. Step 4: Simplify right side
    60,780.96x = 3,312,301,481.28
  5. Step 5: Solve for x
    x = 3,312,301,481.28/60,780.96
  6. Step 6: Final answer
    x = 54,495.71

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1.5x scale

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.