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Finding the Fourth Proportional to 181,887.40, 272,960.70 and 76,781.80

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Solution

The fourth proportional to 181,887.40, 272,960.70 and 76,781.80 is: 115,227.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,887.40 : 272,960.70 = 76,781.80 : x
  2. Step 2: Convert to fraction form
    181,887.40/272,960.70 = 76,781.80/x
  3. Step 3: Cross multiply
    181,887.40x = 272,960.70 × 76,781.80
  4. Step 4: Simplify right side
    181,887.40x = 20,958,413,875.26
  5. Step 5: Solve for x
    x = 20,958,413,875.26/181,887.40
  6. Step 6: Final answer
    x = 115,227.41

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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.