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Finding the Fourth Proportional to 190,312.76, 285,469.14 and 79,427

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Solution

The fourth proportional to 190,312.76, 285,469.14 and 79,427 is: 119,140.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,312.76 : 285,469.14 = 79,427 : x
  2. Step 2: Convert to fraction form
    190,312.76/285,469.14 = 79,427/x
  3. Step 3: Cross multiply
    190,312.76x = 285,469.14 × 79,427
  4. Step 4: Simplify right side
    190,312.76x = 22,673,957,382.78
  5. Step 5: Solve for x
    x = 22,673,957,382.78/190,312.76
  6. Step 6: Final answer
    x = 119,140.50

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1.5x scale

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.