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Finding the Fourth Proportional to 69,354, 104,013.60 and 19,421.16

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Solution

The fourth proportional to 69,354, 104,013.60 and 19,421.16 is: 29,126.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,354 : 104,013.60 = 19,421.16 : x
  2. Step 2: Convert to fraction form
    69,354/104,013.60 = 19,421.16/x
  3. Step 3: Cross multiply
    69,354x = 104,013.60 × 19,421.16
  4. Step 4: Simplify right side
    69,354x = 2,020,064,767.78
  5. Step 5: Solve for x
    x = 2,020,064,767.78/69,354
  6. Step 6: Final answer
    x = 29,126.87

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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.