Home / 78,203.20-107,920.56-42,393.10

Finding the Fourth Proportional to 78,203.20, 107,920.56 and 42,393.10

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Solution

The fourth proportional to 78,203.20, 107,920.56 and 42,393.10 is: 58,502.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,203.20 : 107,920.56 = 42,393.10 : x
  2. Step 2: Convert to fraction form
    78,203.20/107,920.56 = 42,393.10/x
  3. Step 3: Cross multiply
    78,203.20x = 107,920.56 × 42,393.10
  4. Step 4: Simplify right side
    78,203.20x = 4,575,087,092.14
  5. Step 5: Solve for x
    x = 4,575,087,092.14/78,203.20
  6. Step 6: Final answer
    x = 58,502.56

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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.