Home / 87,653.11-120,969.80-51,854.65

Finding the Fourth Proportional to 87,653.11, 120,969.80 and 51,854.65

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Solution

The fourth proportional to 87,653.11, 120,969.80 and 51,854.65 is: 71,564.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,653.11 : 120,969.80 = 51,854.65 : x
  2. Step 2: Convert to fraction form
    87,653.11/120,969.80 = 51,854.65/x
  3. Step 3: Cross multiply
    87,653.11x = 120,969.80 × 51,854.65
  4. Step 4: Simplify right side
    87,653.11x = 6,272,846,639.57
  5. Step 5: Solve for x
    x = 6,272,846,639.57/87,653.11
  6. Step 6: Final answer
    x = 71,564.45

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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.