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Finding the Fourth Proportional to 78,876.32, 108,849.36 and 45,340.32

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Solution

The fourth proportional to 78,876.32, 108,849.36 and 45,340.32 is: 62,569.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,876.32 : 108,849.36 = 45,340.32 : x
  2. Step 2: Convert to fraction form
    78,876.32/108,849.36 = 45,340.32/x
  3. Step 3: Cross multiply
    78,876.32x = 108,849.36 × 45,340.32
  4. Step 4: Simplify right side
    78,876.32x = 4,935,264,814.20
  5. Step 5: Solve for x
    x = 4,935,264,814.20/78,876.32
  6. Step 6: Final answer
    x = 62,569.66

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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.