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Finding the Fourth Proportional to 72,623.97, 100,218.90 and 40,358.49

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Solution

The fourth proportional to 72,623.97, 100,218.90 and 40,358.49 is: 55,693.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,623.97 : 100,218.90 = 40,358.49 : x
  2. Step 2: Convert to fraction form
    72,623.97/100,218.90 = 40,358.49/x
  3. Step 3: Cross multiply
    72,623.97x = 100,218.90 × 40,358.49
  4. Step 4: Simplify right side
    72,623.97x = 4,044,683,473.46
  5. Step 5: Solve for x
    x = 4,044,683,473.46/72,623.97
  6. Step 6: Final answer
    x = 55,693.51

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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.