Home / 78,348.36-108,121.86-42,538.44

Finding the Fourth Proportional to 78,348.36, 108,121.86 and 42,538.44

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Solution

The fourth proportional to 78,348.36, 108,121.86 and 42,538.44 is: 58,703.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,348.36 : 108,121.86 = 42,538.44 : x
  2. Step 2: Convert to fraction form
    78,348.36/108,121.86 = 42,538.44/x
  3. Step 3: Cross multiply
    78,348.36x = 108,121.86 × 42,538.44
  4. Step 4: Simplify right side
    78,348.36x = 4,599,335,254.30
  5. Step 5: Solve for x
    x = 4,599,335,254.30/78,348.36
  6. Step 6: Final answer
    x = 58,703.66

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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.