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Finding the Fourth Proportional to 76,959.10, 115,230.12 and 39,945.34

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Solution

The fourth proportional to 76,959.10, 115,230.12 and 39,945.34 is: 59,809.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,959.10 : 115,230.12 = 39,945.34 : x
  2. Step 2: Convert to fraction form
    76,959.10/115,230.12 = 39,945.34/x
  3. Step 3: Cross multiply
    76,959.10x = 115,230.12 × 39,945.34
  4. Step 4: Simplify right side
    76,959.10x = 4,602,906,321.64
  5. Step 5: Solve for x
    x = 4,602,906,321.64/76,959.10
  6. Step 6: Final answer
    x = 59,809.77

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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.