Home / 100,035.18-138,098.70-77,322.87

Finding the Fourth Proportional to 100,035.18, 138,098.70 and 77,322.87

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Solution

The fourth proportional to 100,035.18, 138,098.70 and 77,322.87 is: 106,744.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,035.18 : 138,098.70 = 77,322.87 : x
  2. Step 2: Convert to fraction form
    100,035.18/138,098.70 = 77,322.87/x
  3. Step 3: Cross multiply
    100,035.18x = 138,098.70 × 77,322.87
  4. Step 4: Simplify right side
    100,035.18x = 10,678,187,827.27
  5. Step 5: Solve for x
    x = 10,678,187,827.27/100,035.18
  6. Step 6: Final answer
    x = 106,744.33

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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.