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Finding the Fourth Proportional to 94,143.20, 141,214.80 and 31,812.80

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Solution

The fourth proportional to 94,143.20, 141,214.80 and 31,812.80 is: 47,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,143.20 : 141,214.80 = 31,812.80 : x
  2. Step 2: Convert to fraction form
    94,143.20/141,214.80 = 31,812.80/x
  3. Step 3: Cross multiply
    94,143.20x = 141,214.80 × 31,812.80
  4. Step 4: Simplify right side
    94,143.20x = 4,492,438,189.44
  5. Step 5: Solve for x
    x = 4,492,438,189.44/94,143.20
  6. Step 6: Final answer
    x = 47,719.20

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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.