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Finding the Fourth Proportional to 60,612.15, 90,902.03 and 21,165.15

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Solution

The fourth proportional to 60,612.15, 90,902.03 and 21,165.15 is: 31,742.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,612.15 : 90,902.03 = 21,165.15 : x
  2. Step 2: Convert to fraction form
    60,612.15/90,902.03 = 21,165.15/x
  3. Step 3: Cross multiply
    60,612.15x = 90,902.03 × 21,165.15
  4. Step 4: Simplify right side
    60,612.15x = 1,923,954,994.43
  5. Step 5: Solve for x
    x = 1,923,954,994.43/60,612.15
  6. Step 6: Final answer
    x = 31,742.07

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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.