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Finding the Fourth Proportional to 72,443.71, 100,020.86 and 45,261.17

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Solution

The fourth proportional to 72,443.71, 100,020.86 and 45,261.17 is: 62,490.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,443.71 : 100,020.86 = 45,261.17 : x
  2. Step 2: Convert to fraction form
    72,443.71/100,020.86 = 45,261.17/x
  3. Step 3: Cross multiply
    72,443.71x = 100,020.86 × 45,261.17
  4. Step 4: Simplify right side
    72,443.71x = 4,527,061,529.02
  5. Step 5: Solve for x
    x = 4,527,061,529.02/72,443.71
  6. Step 6: Final answer
    x = 62,490.75

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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.