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Finding the Fourth Proportional to 92,711.70, 139,059.45 and 30,382.20

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Solution

The fourth proportional to 92,711.70, 139,059.45 and 30,382.20 is: 45,570.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,711.70 : 139,059.45 = 30,382.20 : x
  2. Step 2: Convert to fraction form
    92,711.70/139,059.45 = 30,382.20/x
  3. Step 3: Cross multiply
    92,711.70x = 139,059.45 × 30,382.20
  4. Step 4: Simplify right side
    92,711.70x = 4,224,932,021.79
  5. Step 5: Solve for x
    x = 4,224,932,021.79/92,711.70
  6. Step 6: Final answer
    x = 45,570.65

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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.