Home / 78,916.92-108,833.04-61,691.52

Finding the Fourth Proportional to 78,916.92, 108,833.04 and 61,691.52

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Solution

The fourth proportional to 78,916.92, 108,833.04 and 61,691.52 is: 85,077.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,916.92 : 108,833.04 = 61,691.52 : x
  2. Step 2: Convert to fraction form
    78,916.92/108,833.04 = 61,691.52/x
  3. Step 3: Cross multiply
    78,916.92x = 108,833.04 × 61,691.52
  4. Step 4: Simplify right side
    78,916.92x = 6,714,075,663.82
  5. Step 5: Solve for x
    x = 6,714,075,663.82/78,916.92
  6. Step 6: Final answer
    x = 85,077.77

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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.