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Finding the Fourth Proportional to 100,045.64, 150,068.72 and 40,881.31

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Solution

The fourth proportional to 100,045.64, 150,068.72 and 40,881.31 is: 61,322.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,045.64 : 150,068.72 = 40,881.31 : x
  2. Step 2: Convert to fraction form
    100,045.64/150,068.72 = 40,881.31/x
  3. Step 3: Cross multiply
    100,045.64x = 150,068.72 × 40,881.31
  4. Step 4: Simplify right side
    100,045.64x = 6,135,005,360.70
  5. Step 5: Solve for x
    x = 6,135,005,360.70/100,045.64
  6. Step 6: Final answer
    x = 61,322.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.