Home / 100,521.57-138,709.94-58,079.19

Finding the Fourth Proportional to 100,521.57, 138,709.94 and 58,079.19

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Solution

The fourth proportional to 100,521.57, 138,709.94 and 58,079.19 is: 80,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,521.57 : 138,709.94 = 58,079.19 : x
  2. Step 2: Convert to fraction form
    100,521.57/138,709.94 = 58,079.19/x
  3. Step 3: Cross multiply
    100,521.57x = 138,709.94 × 58,079.19
  4. Step 4: Simplify right side
    100,521.57x = 8,056,160,411.80
  5. Step 5: Solve for x
    x = 8,056,160,411.80/100,521.57
  6. Step 6: Final answer
    x = 80,143.60

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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.