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Finding the Fourth Proportional to 68,319, 94,280.22 and 38,511

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Solution

The fourth proportional to 68,319, 94,280.22 and 38,511 is: 53,145.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,319 : 94,280.22 = 38,511 : x
  2. Step 2: Convert to fraction form
    68,319/94,280.22 = 38,511/x
  3. Step 3: Cross multiply
    68,319x = 94,280.22 × 38,511
  4. Step 4: Simplify right side
    68,319x = 3,630,825,552.42
  5. Step 5: Solve for x
    x = 3,630,825,552.42/68,319
  6. Step 6: Final answer
    x = 53,145.18

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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.