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Finding the Fourth Proportional to 69,323.45, 103,985.20 and 19,410.91

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Solution

The fourth proportional to 69,323.45, 103,985.20 and 19,410.91 is: 29,116.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,323.45 : 103,985.20 = 19,410.91 : x
  2. Step 2: Convert to fraction form
    69,323.45/103,985.20 = 19,410.91/x
  3. Step 3: Cross multiply
    69,323.45x = 103,985.20 × 19,410.91
  4. Step 4: Simplify right side
    69,323.45x = 2,018,447,358.53
  5. Step 5: Solve for x
    x = 2,018,447,358.53/69,323.45
  6. Step 6: Final answer
    x = 29,116.37

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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.