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Finding the Fourth Proportional to 57,492, 79,358.40 and 40,773.60

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Solution

The fourth proportional to 57,492, 79,358.40 and 40,773.60 is: 56,281.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,492 : 79,358.40 = 40,773.60 : x
  2. Step 2: Convert to fraction form
    57,492/79,358.40 = 40,773.60/x
  3. Step 3: Cross multiply
    57,492x = 79,358.40 × 40,773.60
  4. Step 4: Simplify right side
    57,492x = 3,235,727,658.24
  5. Step 5: Solve for x
    x = 3,235,727,658.24/57,492
  6. Step 6: Final answer
    x = 56,281.35

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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.