Home / 78,238.12-107,967.66-42,427.70

Finding the Fourth Proportional to 78,238.12, 107,967.66 and 42,427.70

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Solution

The fourth proportional to 78,238.12, 107,967.66 and 42,427.70 is: 58,549.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,238.12 : 107,967.66 = 42,427.70 : x
  2. Step 2: Convert to fraction form
    78,238.12/107,967.66 = 42,427.70/x
  3. Step 3: Cross multiply
    78,238.12x = 107,967.66 × 42,427.70
  4. Step 4: Simplify right side
    78,238.12x = 4,580,819,488.18
  5. Step 5: Solve for x
    x = 4,580,819,488.18/78,238.12
  6. Step 6: Final answer
    x = 58,549.71

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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.