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Finding the Fourth Proportional to 72,486.96, 100,037 and 40,657.90

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Solution

The fourth proportional to 72,486.96, 100,037 and 40,657.90 is: 56,110.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.96 : 100,037 = 40,657.90 : x
  2. Step 2: Convert to fraction form
    72,486.96/100,037 = 40,657.90/x
  3. Step 3: Cross multiply
    72,486.96x = 100,037 × 40,657.90
  4. Step 4: Simplify right side
    72,486.96x = 4,067,294,342.30
  5. Step 5: Solve for x
    x = 4,067,294,342.30/72,486.96
  6. Step 6: Final answer
    x = 56,110.70

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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.