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Finding the Fourth Proportional to 60,318, 90,477 and 20,864.52

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Solution

The fourth proportional to 60,318, 90,477 and 20,864.52 is: 31,296.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,318 : 90,477 = 20,864.52 : x
  2. Step 2: Convert to fraction form
    60,318/90,477 = 20,864.52/x
  3. Step 3: Cross multiply
    60,318x = 90,477 × 20,864.52
  4. Step 4: Simplify right side
    60,318x = 1,887,759,176.04
  5. Step 5: Solve for x
    x = 1,887,759,176.04/60,318
  6. Step 6: Final answer
    x = 31,296.78

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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.