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Finding the Fourth Proportional to 216,976.88, 299,424.75 and 121,487

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Solution

The fourth proportional to 216,976.88, 299,424.75 and 121,487 is: 167,650.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,976.88 : 299,424.75 = 121,487 : x
  2. Step 2: Convert to fraction form
    216,976.88/299,424.75 = 121,487/x
  3. Step 3: Cross multiply
    216,976.88x = 299,424.75 × 121,487
  4. Step 4: Simplify right side
    216,976.88x = 36,376,214,603.25
  5. Step 5: Solve for x
    x = 36,376,214,603.25/216,976.88
  6. Step 6: Final answer
    x = 167,650.19

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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.