Home / 100,435.70-138,612.18-64,170.27

Finding the Fourth Proportional to 100,435.70, 138,612.18 and 64,170.27

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Solution

The fourth proportional to 100,435.70, 138,612.18 and 64,170.27 is: 88,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,435.70 : 138,612.18 = 64,170.27 : x
  2. Step 2: Convert to fraction form
    100,435.70/138,612.18 = 64,170.27/x
  3. Step 3: Cross multiply
    100,435.70x = 138,612.18 × 64,170.27
  4. Step 4: Simplify right side
    100,435.70x = 8,894,781,015.89
  5. Step 5: Solve for x
    x = 8,894,781,015.89/100,435.70
  6. Step 6: Final answer
    x = 88,561.95

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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.