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Finding the Fourth Proportional to 115,216.40, 172,565.40 and 68,560.40

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Solution

The fourth proportional to 115,216.40, 172,565.40 and 68,560.40 is: 102,686.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,216.40 : 172,565.40 = 68,560.40 : x
  2. Step 2: Convert to fraction form
    115,216.40/172,565.40 = 68,560.40/x
  3. Step 3: Cross multiply
    115,216.40x = 172,565.40 × 68,560.40
  4. Step 4: Simplify right side
    115,216.40x = 11,831,152,850.16
  5. Step 5: Solve for x
    x = 11,831,152,850.16/115,216.40
  6. Step 6: Final answer
    x = 102,686.36

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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.