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Finding the Fourth Proportional to 60,438.48, 90,624.44 and 20,992.40

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Solution

The fourth proportional to 60,438.48, 90,624.44 and 20,992.40 is: 31,477.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,438.48 : 90,624.44 = 20,992.40 : x
  2. Step 2: Convert to fraction form
    60,438.48/90,624.44 = 20,992.40/x
  3. Step 3: Cross multiply
    60,438.48x = 90,624.44 × 20,992.40
  4. Step 4: Simplify right side
    60,438.48x = 1,902,424,494.26
  5. Step 5: Solve for x
    x = 1,902,424,494.26/60,438.48
  6. Step 6: Final answer
    x = 31,477.04

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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.