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Finding the Fourth Proportional to 72,708.64, 100,340.82 and 40,877.44

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Solution

The fourth proportional to 72,708.64, 100,340.82 and 40,877.44 is: 56,412.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,708.64 : 100,340.82 = 40,877.44 : x
  2. Step 2: Convert to fraction form
    72,708.64/100,340.82 = 40,877.44/x
  3. Step 3: Cross multiply
    72,708.64x = 100,340.82 × 40,877.44
  4. Step 4: Simplify right side
    72,708.64x = 4,101,675,849.10
  5. Step 5: Solve for x
    x = 4,101,675,849.10/72,708.64
  6. Step 6: Final answer
    x = 56,412.50

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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.