Home / 112,668.90-155,480.76-61,680.42

Finding the Fourth Proportional to 112,668.90, 155,480.76 and 61,680.42

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Solution

The fourth proportional to 112,668.90, 155,480.76 and 61,680.42 is: 85,117.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,668.90 : 155,480.76 = 61,680.42 : x
  2. Step 2: Convert to fraction form
    112,668.90/155,480.76 = 61,680.42/x
  3. Step 3: Cross multiply
    112,668.90x = 155,480.76 × 61,680.42
  4. Step 4: Simplify right side
    112,668.90x = 9,590,118,578.72
  5. Step 5: Solve for x
    x = 9,590,118,578.72/112,668.90
  6. Step 6: Final answer
    x = 85,117.71

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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.