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Finding the Fourth Proportional to 115,698.85, 159,663.34 and 64,710.97

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Solution

The fourth proportional to 115,698.85, 159,663.34 and 64,710.97 is: 89,300.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,698.85 : 159,663.34 = 64,710.97 : x
  2. Step 2: Convert to fraction form
    115,698.85/159,663.34 = 64,710.97/x
  3. Step 3: Cross multiply
    115,698.85x = 159,663.34 × 64,710.97
  4. Step 4: Simplify right side
    115,698.85x = 10,331,969,604.84
  5. Step 5: Solve for x
    x = 10,331,969,604.84/115,698.85
  6. Step 6: Final answer
    x = 89,300.54

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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.