Home / 109,711.80-151,427.88-77,890.68

Finding the Fourth Proportional to 109,711.80, 151,427.88 and 77,890.68

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Solution

The fourth proportional to 109,711.80, 151,427.88 and 77,890.68 is: 107,507.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,711.80 : 151,427.88 = 77,890.68 : x
  2. Step 2: Convert to fraction form
    109,711.80/151,427.88 = 77,890.68/x
  3. Step 3: Cross multiply
    109,711.80x = 151,427.88 × 77,890.68
  4. Step 4: Simplify right side
    109,711.80x = 11,794,820,544.16
  5. Step 5: Solve for x
    x = 11,794,820,544.16/109,711.80
  6. Step 6: Final answer
    x = 107,507.31

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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.