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Finding the Fourth Proportional to 60,312.20, 90,446.62 and 20,858.60

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Solution

The fourth proportional to 60,312.20, 90,446.62 and 20,858.60 is: 31,280.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,312.20 : 90,446.62 = 20,858.60 : x
  2. Step 2: Convert to fraction form
    60,312.20/90,446.62 = 20,858.60/x
  3. Step 3: Cross multiply
    60,312.20x = 90,446.62 × 20,858.60
  4. Step 4: Simplify right side
    60,312.20x = 1,886,589,867.93
  5. Step 5: Solve for x
    x = 1,886,589,867.93/60,312.20
  6. Step 6: Final answer
    x = 31,280.40

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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.