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Finding the Fourth Proportional to 60,662.53, 90,931.81 and 21,187.18

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Solution

The fourth proportional to 60,662.53, 90,931.81 and 21,187.18 is: 31,759.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,662.53 : 90,931.81 = 21,187.18 : x
  2. Step 2: Convert to fraction form
    60,662.53/90,931.81 = 21,187.18/x
  3. Step 3: Cross multiply
    60,662.53x = 90,931.81 × 21,187.18
  4. Step 4: Simplify right side
    60,662.53x = 1,926,588,626.20
  5. Step 5: Solve for x
    x = 1,926,588,626.20/60,662.53
  6. Step 6: Final answer
    x = 31,759.12

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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.