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Finding the Fourth Proportional to 68,403, 102,560.08 and 28,411

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Solution

The fourth proportional to 68,403, 102,560.08 and 28,411 is: 42,598.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,403 : 102,560.08 = 28,411 : x
  2. Step 2: Convert to fraction form
    68,403/102,560.08 = 28,411/x
  3. Step 3: Cross multiply
    68,403x = 102,560.08 × 28,411
  4. Step 4: Simplify right side
    68,403x = 2,913,834,432.88
  5. Step 5: Solve for x
    x = 2,913,834,432.88/68,403
  6. Step 6: Final answer
    x = 42,598.05

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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.