Home / 87,406.80-120,557.48-57,143.58

Finding the Fourth Proportional to 87,406.80, 120,557.48 and 57,143.58

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Solution

The fourth proportional to 87,406.80, 120,557.48 and 57,143.58 is: 78,816.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,406.80 : 120,557.48 = 57,143.58 : x
  2. Step 2: Convert to fraction form
    87,406.80/120,557.48 = 57,143.58/x
  3. Step 3: Cross multiply
    87,406.80x = 120,557.48 × 57,143.58
  4. Step 4: Simplify right side
    87,406.80x = 6,889,085,717.26
  5. Step 5: Solve for x
    x = 6,889,085,717.26/87,406.80
  6. Step 6: Final answer
    x = 78,816.36

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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.