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Finding the Fourth Proportional to 72,748.17, 100,384.65 and 40,910.31

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Solution

The fourth proportional to 72,748.17, 100,384.65 and 40,910.31 is: 56,451.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,748.17 : 100,384.65 = 40,910.31 : x
  2. Step 2: Convert to fraction form
    72,748.17/100,384.65 = 40,910.31/x
  3. Step 3: Cross multiply
    72,748.17x = 100,384.65 × 40,910.31
  4. Step 4: Simplify right side
    72,748.17x = 4,106,767,150.74
  5. Step 5: Solve for x
    x = 4,106,767,150.74/72,748.17
  6. Step 6: Final answer
    x = 56,451.83

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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.