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Finding the Fourth Proportional to 186,638, 279,985.20 and 60,236

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Solution

The fourth proportional to 186,638, 279,985.20 and 60,236 is: 90,363.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,638 : 279,985.20 = 60,236 : x
  2. Step 2: Convert to fraction form
    186,638/279,985.20 = 60,236/x
  3. Step 3: Cross multiply
    186,638x = 279,985.20 × 60,236
  4. Step 4: Simplify right side
    186,638x = 16,865,188,507.20
  5. Step 5: Solve for x
    x = 16,865,188,507.20/186,638
  6. Step 6: Final answer
    x = 90,363.10

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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.