Home / 89,029.13-122,920.34-56,781.81

Finding the Fourth Proportional to 89,029.13, 122,920.34 and 56,781.81

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Solution

The fourth proportional to 89,029.13, 122,920.34 and 56,781.81 is: 78,397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,029.13 : 122,920.34 = 56,781.81 : x
  2. Step 2: Convert to fraction form
    89,029.13/122,920.34 = 56,781.81/x
  3. Step 3: Cross multiply
    89,029.13x = 122,920.34 × 56,781.81
  4. Step 4: Simplify right side
    89,029.13x = 6,979,639,107.11
  5. Step 5: Solve for x
    x = 6,979,639,107.11/89,029.13
  6. Step 6: Final answer
    x = 78,397.26

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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.