Home / 91,513.12-126,366.92-57,578.16

Finding the Fourth Proportional to 91,513.12, 126,366.92 and 57,578.16

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Solution

The fourth proportional to 91,513.12, 126,366.92 and 57,578.16 is: 79,507.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,513.12 : 126,366.92 = 57,578.16 : x
  2. Step 2: Convert to fraction form
    91,513.12/126,366.92 = 57,578.16/x
  3. Step 3: Cross multiply
    91,513.12x = 126,366.92 × 57,578.16
  4. Step 4: Simplify right side
    91,513.12x = 7,275,974,738.47
  5. Step 5: Solve for x
    x = 7,275,974,738.47/91,513.12
  6. Step 6: Final answer
    x = 79,507.45

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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.