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Finding the Fourth Proportional to 128,228.40, 176,952.60 and 77,943.60

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Solution

The fourth proportional to 128,228.40, 176,952.60 and 77,943.60 is: 107,560.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,228.40 : 176,952.60 = 77,943.60 : x
  2. Step 2: Convert to fraction form
    128,228.40/176,952.60 = 77,943.60/x
  3. Step 3: Cross multiply
    128,228.40x = 176,952.60 × 77,943.60
  4. Step 4: Simplify right side
    128,228.40x = 13,792,322,673.36
  5. Step 5: Solve for x
    x = 13,792,322,673.36/128,228.40
  6. Step 6: Final answer
    x = 107,560.59

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1.5x scale

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.