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Finding the Fourth Proportional to 128,866.50, 177,913.53 and 84,232.26

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Solution

The fourth proportional to 128,866.50, 177,913.53 and 84,232.26 is: 116,291.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,866.50 : 177,913.53 = 84,232.26 : x
  2. Step 2: Convert to fraction form
    128,866.50/177,913.53 = 84,232.26/x
  3. Step 3: Cross multiply
    128,866.50x = 177,913.53 × 84,232.26
  4. Step 4: Simplify right side
    128,866.50x = 14,986,058,716.48
  5. Step 5: Solve for x
    x = 14,986,058,716.48/128,866.50
  6. Step 6: Final answer
    x = 116,291.35

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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.