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Finding the Fourth Proportional to 72,587.96, 100,171.31 and 40,756.98

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Solution

The fourth proportional to 72,587.96, 100,171.31 and 40,756.98 is: 56,244.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,587.96 : 100,171.31 = 40,756.98 : x
  2. Step 2: Convert to fraction form
    72,587.96/100,171.31 = 40,756.98/x
  3. Step 3: Cross multiply
    72,587.96x = 100,171.31 × 40,756.98
  4. Step 4: Simplify right side
    72,587.96x = 4,082,679,874.46
  5. Step 5: Solve for x
    x = 4,082,679,874.46/72,587.96
  6. Step 6: Final answer
    x = 56,244.59

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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.