Home / 100,886.72-139,222.40-58,449.20

Finding the Fourth Proportional to 100,886.72, 139,222.40 and 58,449.20

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Solution

The fourth proportional to 100,886.72, 139,222.40 and 58,449.20 is: 80,659.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,886.72 : 139,222.40 = 58,449.20 : x
  2. Step 2: Convert to fraction form
    100,886.72/139,222.40 = 58,449.20/x
  3. Step 3: Cross multiply
    100,886.72x = 139,222.40 × 58,449.20
  4. Step 4: Simplify right side
    100,886.72x = 8,137,437,902.08
  5. Step 5: Solve for x
    x = 8,137,437,902.08/100,886.72
  6. Step 6: Final answer
    x = 80,659.16

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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.