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Finding the Fourth Proportional to 57,870.80, 79,861.32 and 32,720.40

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Solution

The fourth proportional to 57,870.80, 79,861.32 and 32,720.40 is: 45,153.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,870.80 : 79,861.32 = 32,720.40 : x
  2. Step 2: Convert to fraction form
    57,870.80/79,861.32 = 32,720.40/x
  3. Step 3: Cross multiply
    57,870.80x = 79,861.32 × 32,720.40
  4. Step 4: Simplify right side
    57,870.80x = 2,613,094,334.93
  5. Step 5: Solve for x
    x = 2,613,094,334.93/57,870.80
  6. Step 6: Final answer
    x = 45,153.93

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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.