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Finding the Fourth Proportional to 100,572.98, 138,775.30 and 58,123.32

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Solution

The fourth proportional to 100,572.98, 138,775.30 and 58,123.32 is: 80,201.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,572.98 : 138,775.30 = 58,123.32 : x
  2. Step 2: Convert to fraction form
    100,572.98/138,775.30 = 58,123.32/x
  3. Step 3: Cross multiply
    100,572.98x = 138,775.30 × 58,123.32
  4. Step 4: Simplify right side
    100,572.98x = 8,066,081,170.00
  5. Step 5: Solve for x
    x = 8,066,081,170.00/100,572.98
  6. Step 6: Final answer
    x = 80,201.27

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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.