Home / 78,686.58-108,587.44-42,876.55

Finding the Fourth Proportional to 78,686.58, 108,587.44 and 42,876.55

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Solution

The fourth proportional to 78,686.58, 108,587.44 and 42,876.55 is: 59,169.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,686.58 : 108,587.44 = 42,876.55 : x
  2. Step 2: Convert to fraction form
    78,686.58/108,587.44 = 42,876.55/x
  3. Step 3: Cross multiply
    78,686.58x = 108,587.44 × 42,876.55
  4. Step 4: Simplify right side
    78,686.58x = 4,655,854,421.87
  5. Step 5: Solve for x
    x = 4,655,854,421.87/78,686.58
  6. Step 6: Final answer
    x = 59,169.61

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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.