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Finding the Fourth Proportional to 258,081.30, 387,121.95 and 163,602.90

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Solution

The fourth proportional to 258,081.30, 387,121.95 and 163,602.90 is: 245,404.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,081.30 : 387,121.95 = 163,602.90 : x
  2. Step 2: Convert to fraction form
    258,081.30/387,121.95 = 163,602.90/x
  3. Step 3: Cross multiply
    258,081.30x = 387,121.95 × 163,602.90
  4. Step 4: Simplify right side
    258,081.30x = 63,334,273,673.66
  5. Step 5: Solve for x
    x = 63,334,273,673.66/258,081.30
  6. Step 6: Final answer
    x = 245,404.35

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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.