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Finding the Fourth Proportional to 87,640.30, 131,460.45 and 65,608.30

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Solution

The fourth proportional to 87,640.30, 131,460.45 and 65,608.30 is: 98,412.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,640.30 : 131,460.45 = 65,608.30 : x
  2. Step 2: Convert to fraction form
    87,640.30/131,460.45 = 65,608.30/x
  3. Step 3: Cross multiply
    87,640.30x = 131,460.45 × 65,608.30
  4. Step 4: Simplify right side
    87,640.30x = 8,624,896,641.74
  5. Step 5: Solve for x
    x = 8,624,896,641.74/87,640.30
  6. Step 6: Final answer
    x = 98,412.45

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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.