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Finding the Fourth Proportional to 85,465.60, 128,220.80 and 32,876.80

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Solution

The fourth proportional to 85,465.60, 128,220.80 and 32,876.80 is: 49,323.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,465.60 : 128,220.80 = 32,876.80 : x
  2. Step 2: Convert to fraction form
    85,465.60/128,220.80 = 32,876.80/x
  3. Step 3: Cross multiply
    85,465.60x = 128,220.80 × 32,876.80
  4. Step 4: Simplify right side
    85,465.60x = 4,215,489,597.44
  5. Step 5: Solve for x
    x = 4,215,489,597.44/85,465.60
  6. Step 6: Final answer
    x = 49,323.82

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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.