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Finding the Fourth Proportional to 72,711.84, 100,348.48 and 40,883.68

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Solution

The fourth proportional to 72,711.84, 100,348.48 and 40,883.68 is: 56,422.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,711.84 : 100,348.48 = 40,883.68 : x
  2. Step 2: Convert to fraction form
    72,711.84/100,348.48 = 40,883.68/x
  3. Step 3: Cross multiply
    72,711.84x = 100,348.48 × 40,883.68
  4. Step 4: Simplify right side
    72,711.84x = 4,102,615,144.81
  5. Step 5: Solve for x
    x = 4,102,615,144.81/72,711.84
  6. Step 6: Final answer
    x = 56,422.93

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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.