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Finding the Fourth Proportional to 78,552.32, 117,718.40 and 60,940.80

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Solution

The fourth proportional to 78,552.32, 117,718.40 and 60,940.80 is: 91,325.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,552.32 : 117,718.40 = 60,940.80 : x
  2. Step 2: Convert to fraction form
    78,552.32/117,718.40 = 60,940.80/x
  3. Step 3: Cross multiply
    78,552.32x = 117,718.40 × 60,940.80
  4. Step 4: Simplify right side
    78,552.32x = 7,173,853,470.72
  5. Step 5: Solve for x
    x = 7,173,853,470.72/78,552.32
  6. Step 6: Final answer
    x = 91,325.80

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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.