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Finding the Fourth Proportional to 115,866.72, 159,909.51 and 70,571.28

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Solution

The fourth proportional to 115,866.72, 159,909.51 and 70,571.28 is: 97,396.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,866.72 : 159,909.51 = 70,571.28 : x
  2. Step 2: Convert to fraction form
    115,866.72/159,909.51 = 70,571.28/x
  3. Step 3: Cross multiply
    115,866.72x = 159,909.51 × 70,571.28
  4. Step 4: Simplify right side
    115,866.72x = 11,285,018,804.87
  5. Step 5: Solve for x
    x = 11,285,018,804.87/115,866.72
  6. Step 6: Final answer
    x = 97,396.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.