Home / 91,917.36-126,894.12-61,860.72

Finding the Fourth Proportional to 91,917.36, 126,894.12 and 61,860.72

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Solution

The fourth proportional to 91,917.36, 126,894.12 and 61,860.72 is: 85,400.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,917.36 : 126,894.12 = 61,860.72 : x
  2. Step 2: Convert to fraction form
    91,917.36/126,894.12 = 61,860.72/x
  3. Step 3: Cross multiply
    91,917.36x = 126,894.12 × 61,860.72
  4. Step 4: Simplify right side
    91,917.36x = 7,849,761,626.97
  5. Step 5: Solve for x
    x = 7,849,761,626.97/91,917.36
  6. Step 6: Final answer
    x = 85,400.21

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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.