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Finding the Fourth Proportional to 115,908.40, 173,887.80 and 66,012.40

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Solution

The fourth proportional to 115,908.40, 173,887.80 and 66,012.40 is: 99,032.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,908.40 : 173,887.80 = 66,012.40 : x
  2. Step 2: Convert to fraction form
    115,908.40/173,887.80 = 66,012.40/x
  3. Step 3: Cross multiply
    115,908.40x = 173,887.80 × 66,012.40
  4. Step 4: Simplify right side
    115,908.40x = 11,478,751,008.72
  5. Step 5: Solve for x
    x = 11,478,751,008.72/115,908.40
  6. Step 6: Final answer
    x = 99,032.95

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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.