Home / 87,920.80-121,210.20-55,639.36

Finding the Fourth Proportional to 87,920.80, 121,210.20 and 55,639.36

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Solution

The fourth proportional to 87,920.80, 121,210.20 and 55,639.36 is: 76,706.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.80 : 121,210.20 = 55,639.36 : x
  2. Step 2: Convert to fraction form
    87,920.80/121,210.20 = 55,639.36/x
  3. Step 3: Cross multiply
    87,920.80x = 121,210.20 × 55,639.36
  4. Step 4: Simplify right side
    87,920.80x = 6,744,057,953.47
  5. Step 5: Solve for x
    x = 6,744,057,953.47/87,920.80
  6. Step 6: Final answer
    x = 76,706.06

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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.