Home / 131,638.43-181,661.47-71,209.60

Finding the Fourth Proportional to 131,638.43, 181,661.47 and 71,209.60

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Solution

The fourth proportional to 131,638.43, 181,661.47 and 71,209.60 is: 98,269.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,638.43 : 181,661.47 = 71,209.60 : x
  2. Step 2: Convert to fraction form
    131,638.43/181,661.47 = 71,209.60/x
  3. Step 3: Cross multiply
    131,638.43x = 181,661.47 × 71,209.60
  4. Step 4: Simplify right side
    131,638.43x = 12,936,039,981.93
  5. Step 5: Solve for x
    x = 12,936,039,981.93/131,638.43
  6. Step 6: Final answer
    x = 98,269.48

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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.