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Finding the Fourth Proportional to 115,205.51, 172,672.47 and 51,951.57

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Solution

The fourth proportional to 115,205.51, 172,672.47 and 51,951.57 is: 77,866.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,205.51 : 172,672.47 = 51,951.57 : x
  2. Step 2: Convert to fraction form
    115,205.51/172,672.47 = 51,951.57/x
  3. Step 3: Cross multiply
    115,205.51x = 172,672.47 × 51,951.57
  4. Step 4: Simplify right side
    115,205.51x = 8,970,605,912.28
  5. Step 5: Solve for x
    x = 8,970,605,912.28/115,205.51
  6. Step 6: Final answer
    x = 77,866.12

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1.5x scale

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.