Home / 100,521.30-138,722.66-58,079.84

Finding the Fourth Proportional to 100,521.30, 138,722.66 and 58,079.84

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Solution

The fourth proportional to 100,521.30, 138,722.66 and 58,079.84 is: 80,152.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,521.30 : 138,722.66 = 58,079.84 : x
  2. Step 2: Convert to fraction form
    100,521.30/138,722.66 = 58,079.84/x
  3. Step 3: Cross multiply
    100,521.30x = 138,722.66 × 58,079.84
  4. Step 4: Simplify right side
    100,521.30x = 8,056,989,130.96
  5. Step 5: Solve for x
    x = 8,056,989,130.96/100,521.30
  6. Step 6: Final answer
    x = 80,152.06

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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.