Home / 78,587.42-117,881.07-22,428.65

Finding the Fourth Proportional to 78,587.42, 117,881.07 and 22,428.65

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Solution

The fourth proportional to 78,587.42, 117,881.07 and 22,428.65 is: 33,642.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.42 : 117,881.07 = 22,428.65 : x
  2. Step 2: Convert to fraction form
    78,587.42/117,881.07 = 22,428.65/x
  3. Step 3: Cross multiply
    78,587.42x = 117,881.07 × 22,428.65
  4. Step 4: Simplify right side
    78,587.42x = 2,643,912,934.33
  5. Step 5: Solve for x
    x = 2,643,912,934.33/78,587.42
  6. Step 6: Final answer
    x = 33,642.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.