Home / 127,890.28-191,890.68-68,656.78

Finding the Fourth Proportional to 127,890.28, 191,890.68 and 68,656.78

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Solution

The fourth proportional to 127,890.28, 191,890.68 and 68,656.78 is: 103,014.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,890.28 : 191,890.68 = 68,656.78 : x
  2. Step 2: Convert to fraction form
    127,890.28/191,890.68 = 68,656.78/x
  3. Step 3: Cross multiply
    127,890.28x = 191,890.68 × 68,656.78
  4. Step 4: Simplify right side
    127,890.28x = 13,174,596,200.81
  5. Step 5: Solve for x
    x = 13,174,596,200.81/127,890.28
  6. Step 6: Final answer
    x = 103,014.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.