Home / 100,211.28-138,225-64,446.52

Finding the Fourth Proportional to 100,211.28, 138,225 and 64,446.52

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Solution

The fourth proportional to 100,211.28, 138,225 and 64,446.52 is: 88,893.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,211.28 : 138,225 = 64,446.52 : x
  2. Step 2: Convert to fraction form
    100,211.28/138,225 = 64,446.52/x
  3. Step 3: Cross multiply
    100,211.28x = 138,225 × 64,446.52
  4. Step 4: Simplify right side
    100,211.28x = 8,908,120,227
  5. Step 5: Solve for x
    x = 8,908,120,227/100,211.28
  6. Step 6: Final answer
    x = 88,893.39

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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.