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Finding the Fourth Proportional to 77,661.20, 116,578.20 and 48,112.40

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Solution

The fourth proportional to 77,661.20, 116,578.20 and 48,112.40 is: 72,222.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,661.20 : 116,578.20 = 48,112.40 : x
  2. Step 2: Convert to fraction form
    77,661.20/116,578.20 = 48,112.40/x
  3. Step 3: Cross multiply
    77,661.20x = 116,578.20 × 48,112.40
  4. Step 4: Simplify right side
    77,661.20x = 5,608,856,989.68
  5. Step 5: Solve for x
    x = 5,608,856,989.68/77,661.20
  6. Step 6: Final answer
    x = 72,222.13

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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.