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Finding the Fourth Proportional to 72,569.44, 100,138.98 and 40,732.12

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Solution

The fourth proportional to 72,569.44, 100,138.98 and 40,732.12 is: 56,206.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,569.44 : 100,138.98 = 40,732.12 : x
  2. Step 2: Convert to fraction form
    72,569.44/100,138.98 = 40,732.12/x
  3. Step 3: Cross multiply
    72,569.44x = 100,138.98 × 40,732.12
  4. Step 4: Simplify right side
    72,569.44x = 4,078,872,950.04
  5. Step 5: Solve for x
    x = 4,078,872,950.04/72,569.44
  6. Step 6: Final answer
    x = 56,206.48

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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.