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Finding the Fourth Proportional to 72,474.84, 100,010.16 and 40,211.10

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Solution

The fourth proportional to 72,474.84, 100,010.16 and 40,211.10 is: 55,488.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,474.84 : 100,010.16 = 40,211.10 : x
  2. Step 2: Convert to fraction form
    72,474.84/100,010.16 = 40,211.10/x
  3. Step 3: Cross multiply
    72,474.84x = 100,010.16 × 40,211.10
  4. Step 4: Simplify right side
    72,474.84x = 4,021,518,544.78
  5. Step 5: Solve for x
    x = 4,021,518,544.78/72,474.84
  6. Step 6: Final answer
    x = 55,488.48

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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.