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Finding the Fourth Proportional to 76,911.80, 115,367.70 and 47,233.40

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Solution

The fourth proportional to 76,911.80, 115,367.70 and 47,233.40 is: 70,850.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,911.80 : 115,367.70 = 47,233.40 : x
  2. Step 2: Convert to fraction form
    76,911.80/115,367.70 = 47,233.40/x
  3. Step 3: Cross multiply
    76,911.80x = 115,367.70 × 47,233.40
  4. Step 4: Simplify right side
    76,911.80x = 5,449,208,721.18
  5. Step 5: Solve for x
    x = 5,449,208,721.18/76,911.80
  6. Step 6: Final answer
    x = 70,850.10

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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.