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Finding the Fourth Proportional to 60,439.50, 90,662.49 and 18,889.74

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Solution

The fourth proportional to 60,439.50, 90,662.49 and 18,889.74 is: 28,335.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,439.50 : 90,662.49 = 18,889.74 : x
  2. Step 2: Convert to fraction form
    60,439.50/90,662.49 = 18,889.74/x
  3. Step 3: Cross multiply
    60,439.50x = 90,662.49 × 18,889.74
  4. Step 4: Simplify right side
    60,439.50x = 1,712,590,863.85
  5. Step 5: Solve for x
    x = 1,712,590,863.85/60,439.50
  6. Step 6: Final answer
    x = 28,335.62

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1.5x scale

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.