Home / 78,028.65-107,679.33-42,218.64

Finding the Fourth Proportional to 78,028.65, 107,679.33 and 42,218.64

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Solution

The fourth proportional to 78,028.65, 107,679.33 and 42,218.64 is: 58,261.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,028.65 : 107,679.33 = 42,218.64 : x
  2. Step 2: Convert to fraction form
    78,028.65/107,679.33 = 42,218.64/x
  3. Step 3: Cross multiply
    78,028.65x = 107,679.33 × 42,218.64
  4. Step 4: Simplify right side
    78,028.65x = 4,546,074,868.71
  5. Step 5: Solve for x
    x = 4,546,074,868.71/78,028.65
  6. Step 6: Final answer
    x = 58,261.61

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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.