Home / 78,319.39-108,077.86-42,508.63

Finding the Fourth Proportional to 78,319.39, 108,077.86 and 42,508.63

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Solution

The fourth proportional to 78,319.39, 108,077.86 and 42,508.63 is: 58,660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,319.39 : 108,077.86 = 42,508.63 : x
  2. Step 2: Convert to fraction form
    78,319.39/108,077.86 = 42,508.63/x
  3. Step 3: Cross multiply
    78,319.39x = 108,077.86 × 42,508.63
  4. Step 4: Simplify right side
    78,319.39x = 4,594,241,761.93
  5. Step 5: Solve for x
    x = 4,594,241,761.93/78,319.39
  6. Step 6: Final answer
    x = 58,660.34

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1.5x scale

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.