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Finding the Fourth Proportional to 57,710.60, 79,590.43 and 40,684.80

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Solution

The fourth proportional to 57,710.60, 79,590.43 and 40,684.80 is: 56,109.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,710.60 : 79,590.43 = 40,684.80 : x
  2. Step 2: Convert to fraction form
    57,710.60/79,590.43 = 40,684.80/x
  3. Step 3: Cross multiply
    57,710.60x = 79,590.43 × 40,684.80
  4. Step 4: Simplify right side
    57,710.60x = 3,238,120,726.46
  5. Step 5: Solve for x
    x = 3,238,120,726.46/57,710.60
  6. Step 6: Final answer
    x = 56,109.64

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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.