Home / 100,169.03-138,327.07-64,421.30

Finding the Fourth Proportional to 100,169.03, 138,327.07 and 64,421.30

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Solution

The fourth proportional to 100,169.03, 138,327.07 and 64,421.30 is: 88,961.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,169.03 : 138,327.07 = 64,421.30 : x
  2. Step 2: Convert to fraction form
    100,169.03/138,327.07 = 64,421.30/x
  3. Step 3: Cross multiply
    100,169.03x = 138,327.07 × 64,421.30
  4. Step 4: Simplify right side
    100,169.03x = 8,911,209,674.59
  5. Step 5: Solve for x
    x = 8,911,209,674.59/100,169.03
  6. Step 6: Final answer
    x = 88,961.72

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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.