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Finding the Fourth Proportional to 121,105.48, 181,395.66 and 58,645

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Solution

The fourth proportional to 121,105.48, 181,395.66 and 58,645 is: 87,840.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,105.48 : 181,395.66 = 58,645 : x
  2. Step 2: Convert to fraction form
    121,105.48/181,395.66 = 58,645/x
  3. Step 3: Cross multiply
    121,105.48x = 181,395.66 × 58,645
  4. Step 4: Simplify right side
    121,105.48x = 10,637,948,480.70
  5. Step 5: Solve for x
    x = 10,637,948,480.70/121,105.48
  6. Step 6: Final answer
    x = 87,840.36

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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.