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Finding the Fourth Proportional to 78,850.50, 108,785.16 and 60,706.74

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Solution

The fourth proportional to 78,850.50, 108,785.16 and 60,706.74 is: 83,753.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,850.50 : 108,785.16 = 60,706.74 : x
  2. Step 2: Convert to fraction form
    78,850.50/108,785.16 = 60,706.74/x
  3. Step 3: Cross multiply
    78,850.50x = 108,785.16 × 60,706.74
  4. Step 4: Simplify right side
    78,850.50x = 6,603,992,423.98
  5. Step 5: Solve for x
    x = 6,603,992,423.98/78,850.50
  6. Step 6: Final answer
    x = 83,753.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.