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Finding the Fourth Proportional to 72,812.97, 100,454.47 and 42,588.63

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Solution

The fourth proportional to 72,812.97, 100,454.47 and 42,588.63 is: 58,756.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,812.97 : 100,454.47 = 42,588.63 : x
  2. Step 2: Convert to fraction form
    72,812.97/100,454.47 = 42,588.63/x
  3. Step 3: Cross multiply
    72,812.97x = 100,454.47 × 42,588.63
  4. Step 4: Simplify right side
    72,812.97x = 4,278,218,254.68
  5. Step 5: Solve for x
    x = 4,278,218,254.68/72,812.97
  6. Step 6: Final answer
    x = 58,756.27

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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.