Home / 189,710.40-261,922.44-121,756.68

Finding the Fourth Proportional to 189,710.40, 261,922.44 and 121,756.68

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Solution

The fourth proportional to 189,710.40, 261,922.44 and 121,756.68 is: 168,102.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,710.40 : 261,922.44 = 121,756.68 : x
  2. Step 2: Convert to fraction form
    189,710.40/261,922.44 = 121,756.68/x
  3. Step 3: Cross multiply
    189,710.40x = 261,922.44 × 121,756.68
  4. Step 4: Simplify right side
    189,710.40x = 31,890,806,711.90
  5. Step 5: Solve for x
    x = 31,890,806,711.90/189,710.40
  6. Step 6: Final answer
    x = 168,102.57

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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.