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Finding the Fourth Proportional to 69,318.16, 103,983.60 and 19,398.16

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Solution

The fourth proportional to 69,318.16, 103,983.60 and 19,398.16 is: 29,099.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,318.16 : 103,983.60 = 19,398.16 : x
  2. Step 2: Convert to fraction form
    69,318.16/103,983.60 = 19,398.16/x
  3. Step 3: Cross multiply
    69,318.16x = 103,983.60 × 19,398.16
  4. Step 4: Simplify right side
    69,318.16x = 2,017,090,510.18
  5. Step 5: Solve for x
    x = 2,017,090,510.18/69,318.16
  6. Step 6: Final answer
    x = 29,099.02

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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.