Home / 87,109.04-120,215.71-51,322.90

Finding the Fourth Proportional to 87,109.04, 120,215.71 and 51,322.90

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Solution

The fourth proportional to 87,109.04, 120,215.71 and 51,322.90 is: 70,828.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,109.04 : 120,215.71 = 51,322.90 : x
  2. Step 2: Convert to fraction form
    87,109.04/120,215.71 = 51,322.90/x
  3. Step 3: Cross multiply
    87,109.04x = 120,215.71 × 51,322.90
  4. Step 4: Simplify right side
    87,109.04x = 6,169,818,862.76
  5. Step 5: Solve for x
    x = 6,169,818,862.76/87,109.04
  6. Step 6: Final answer
    x = 70,828.69

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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.