Home / 91,421.80-125,936.58-77,949.16

Finding the Fourth Proportional to 91,421.80, 125,936.58 and 77,949.16

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Solution

The fourth proportional to 91,421.80, 125,936.58 and 77,949.16 is: 107,377.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,421.80 : 125,936.58 = 77,949.16 : x
  2. Step 2: Convert to fraction form
    91,421.80/125,936.58 = 77,949.16/x
  3. Step 3: Cross multiply
    91,421.80x = 125,936.58 × 77,949.16
  4. Step 4: Simplify right side
    91,421.80x = 9,816,650,624.27
  5. Step 5: Solve for x
    x = 9,816,650,624.27/91,421.80
  6. Step 6: Final answer
    x = 107,377.57

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1.5x scale

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.