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Finding the Fourth Proportional to 57,711, 79,641.18 and 40,973.16

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Solution

The fourth proportional to 57,711, 79,641.18 and 40,973.16 is: 56,542.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,711 : 79,641.18 = 40,973.16 : x
  2. Step 2: Convert to fraction form
    57,711/79,641.18 = 40,973.16/x
  3. Step 3: Cross multiply
    57,711x = 79,641.18 × 40,973.16
  4. Step 4: Simplify right side
    57,711x = 3,263,150,810.73
  5. Step 5: Solve for x
    x = 3,263,150,810.73/57,711
  6. Step 6: Final answer
    x = 56,542.96

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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.