Home / 100,588.30-138,814.18-55,269.12

Finding the Fourth Proportional to 100,588.30, 138,814.18 and 55,269.12

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Solution

The fourth proportional to 100,588.30, 138,814.18 and 55,269.12 is: 76,272.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,588.30 : 138,814.18 = 55,269.12 : x
  2. Step 2: Convert to fraction form
    100,588.30/138,814.18 = 55,269.12/x
  3. Step 3: Cross multiply
    100,588.30x = 138,814.18 × 55,269.12
  4. Step 4: Simplify right side
    100,588.30x = 7,672,137,572.12
  5. Step 5: Solve for x
    x = 7,672,137,572.12/100,588.30
  6. Step 6: Final answer
    x = 76,272.66

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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.