Home / 100,289.36-138,381.18-64,471.16

Finding the Fourth Proportional to 100,289.36, 138,381.18 and 64,471.16

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Solution

The fourth proportional to 100,289.36, 138,381.18 and 64,471.16 is: 88,958.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,289.36 : 138,381.18 = 64,471.16 : x
  2. Step 2: Convert to fraction form
    100,289.36/138,381.18 = 64,471.16/x
  3. Step 3: Cross multiply
    100,289.36x = 138,381.18 × 64,471.16
  4. Step 4: Simplify right side
    100,289.36x = 8,921,595,300.95
  5. Step 5: Solve for x
    x = 8,921,595,300.95/100,289.36
  6. Step 6: Final answer
    x = 88,958.54

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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.