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Finding the Fourth Proportional to 100,379.50, 138,531.03 and 57,358.00

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Solution

The fourth proportional to 100,379.50, 138,531.03 and 57,358.00 is: 79,158.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,379.50 : 138,531.03 = 57,358.00 : x
  2. Step 2: Convert to fraction form
    100,379.50/138,531.03 = 57,358.00/x
  3. Step 3: Cross multiply
    100,379.50x = 138,531.03 × 57,358.00
  4. Step 4: Simplify right side
    100,379.50x = 7,945,862,776.81
  5. Step 5: Solve for x
    x = 7,945,862,776.81/100,379.50
  6. Step 6: Final answer
    x = 79,158.22

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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.