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Finding the Fourth Proportional to 78,587.96, 108,452.94 and 61,612.52

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Solution

The fourth proportional to 78,587.96, 108,452.94 and 61,612.52 is: 85,026.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.96 : 108,452.94 = 61,612.52 : x
  2. Step 2: Convert to fraction form
    78,587.96/108,452.94 = 61,612.52/x
  3. Step 3: Cross multiply
    78,587.96x = 108,452.94 × 61,612.52
  4. Step 4: Simplify right side
    78,587.96x = 6,682,058,934.81
  5. Step 5: Solve for x
    x = 6,682,058,934.81/78,587.96
  6. Step 6: Final answer
    x = 85,026.50

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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.