Home / 78,920.28-108,835.80-58,821.72

Finding the Fourth Proportional to 78,920.28, 108,835.80 and 58,821.72

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Solution

The fourth proportional to 78,920.28, 108,835.80 and 58,821.72 is: 81,118.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,920.28 : 108,835.80 = 58,821.72 : x
  2. Step 2: Convert to fraction form
    78,920.28/108,835.80 = 58,821.72/x
  3. Step 3: Cross multiply
    78,920.28x = 108,835.80 × 58,821.72
  4. Step 4: Simplify right side
    78,920.28x = 6,401,908,953.58
  5. Step 5: Solve for x
    x = 6,401,908,953.58/78,920.28
  6. Step 6: Final answer
    x = 81,118.68

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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.