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Finding the Fourth Proportional to 60,930.40, 91,404.26 and 18,813.94

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Solution

The fourth proportional to 60,930.40, 91,404.26 and 18,813.94 is: 28,223.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,930.40 : 91,404.26 = 18,813.94 : x
  2. Step 2: Convert to fraction form
    60,930.40/91,404.26 = 18,813.94/x
  3. Step 3: Cross multiply
    60,930.40x = 91,404.26 × 18,813.94
  4. Step 4: Simplify right side
    60,930.40x = 1,719,674,263.38
  5. Step 5: Solve for x
    x = 1,719,674,263.38/60,930.40
  6. Step 6: Final answer
    x = 28,223.58

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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.