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Finding the Fourth Proportional to 72,988.73, 100,724.47 and 39,454.73

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Solution

The fourth proportional to 72,988.73, 100,724.47 and 39,454.73 is: 54,447.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,988.73 : 100,724.47 = 39,454.73 : x
  2. Step 2: Convert to fraction form
    72,988.73/100,724.47 = 39,454.73/x
  3. Step 3: Cross multiply
    72,988.73x = 100,724.47 × 39,454.73
  4. Step 4: Simplify right side
    72,988.73x = 3,974,056,165.98
  5. Step 5: Solve for x
    x = 3,974,056,165.98/72,988.73
  6. Step 6: Final answer
    x = 54,447.54

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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.