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Finding the Fourth Proportional to 115,911.40, 173,892.30 and 66,015.40

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Solution

The fourth proportional to 115,911.40, 173,892.30 and 66,015.40 is: 99,037.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,911.40 : 173,892.30 = 66,015.40 : x
  2. Step 2: Convert to fraction form
    115,911.40/173,892.30 = 66,015.40/x
  3. Step 3: Cross multiply
    115,911.40x = 173,892.30 × 66,015.40
  4. Step 4: Simplify right side
    115,911.40x = 11,479,569,741.42
  5. Step 5: Solve for x
    x = 11,479,569,741.42/115,911.40
  6. Step 6: Final answer
    x = 99,037.45

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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.