Home / 101,416.28-139,872.30-77,505.08

Finding the Fourth Proportional to 101,416.28, 139,872.30 and 77,505.08

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Solution

The fourth proportional to 101,416.28, 139,872.30 and 77,505.08 is: 106,894.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,416.28 : 139,872.30 = 77,505.08 : x
  2. Step 2: Convert to fraction form
    101,416.28/139,872.30 = 77,505.08/x
  3. Step 3: Cross multiply
    101,416.28x = 139,872.30 × 77,505.08
  4. Step 4: Simplify right side
    101,416.28x = 10,840,813,801.28
  5. Step 5: Solve for x
    x = 10,840,813,801.28/101,416.28
  6. Step 6: Final answer
    x = 106,894.22

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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.