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Finding the Fourth Proportional to 72,988.65, 100,722.78 and 41,158.71

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Solution

The fourth proportional to 72,988.65, 100,722.78 and 41,158.71 is: 56,798.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,988.65 : 100,722.78 = 41,158.71 : x
  2. Step 2: Convert to fraction form
    72,988.65/100,722.78 = 41,158.71/x
  3. Step 3: Cross multiply
    72,988.65x = 100,722.78 × 41,158.71
  4. Step 4: Simplify right side
    72,988.65x = 4,145,619,692.41
  5. Step 5: Solve for x
    x = 4,145,619,692.41/72,988.65
  6. Step 6: Final answer
    x = 56,798.14

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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.