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Finding the Fourth Proportional to 57,780.80, 79,680.64 and 35,122.88

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Solution

The fourth proportional to 57,780.80, 79,680.64 and 35,122.88 is: 48,435.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,780.80 : 79,680.64 = 35,122.88 : x
  2. Step 2: Convert to fraction form
    57,780.80/79,680.64 = 35,122.88/x
  3. Step 3: Cross multiply
    57,780.80x = 79,680.64 × 35,122.88
  4. Step 4: Simplify right side
    57,780.80x = 2,798,613,557.04
  5. Step 5: Solve for x
    x = 2,798,613,557.04/57,780.80
  6. Step 6: Final answer
    x = 48,435.01

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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.