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Finding the Fourth Proportional to 100,918.32, 139,267.32 and 58,501.44

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Solution

The fourth proportional to 100,918.32, 139,267.32 and 58,501.44 is: 80,732.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,918.32 : 139,267.32 = 58,501.44 : x
  2. Step 2: Convert to fraction form
    100,918.32/139,267.32 = 58,501.44/x
  3. Step 3: Cross multiply
    100,918.32x = 139,267.32 × 58,501.44
  4. Step 4: Simplify right side
    100,918.32x = 8,147,338,764.94
  5. Step 5: Solve for x
    x = 8,147,338,764.94/100,918.32
  6. Step 6: Final answer
    x = 80,732.01

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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.