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Finding the Fourth Proportional to 79,407.32, 109,583.82 and 45,418.88

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Solution

The fourth proportional to 79,407.32, 109,583.82 and 45,418.88 is: 62,679.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,407.32 : 109,583.82 = 45,418.88 : x
  2. Step 2: Convert to fraction form
    79,407.32/109,583.82 = 45,418.88/x
  3. Step 3: Cross multiply
    79,407.32x = 109,583.82 × 45,418.88
  4. Step 4: Simplify right side
    79,407.32x = 4,977,174,370.52
  5. Step 5: Solve for x
    x = 4,977,174,370.52/79,407.32
  6. Step 6: Final answer
    x = 62,679.04

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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.