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Finding the Fourth Proportional to 88,928.80, 133,065.15 and 81,055.60

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Solution

The fourth proportional to 88,928.80, 133,065.15 and 81,055.60 is: 121,284.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,928.80 : 133,065.15 = 81,055.60 : x
  2. Step 2: Convert to fraction form
    88,928.80/133,065.15 = 81,055.60/x
  3. Step 3: Cross multiply
    88,928.80x = 133,065.15 × 81,055.60
  4. Step 4: Simplify right side
    88,928.80x = 10,785,675,572.34
  5. Step 5: Solve for x
    x = 10,785,675,572.34/88,928.80
  6. Step 6: Final answer
    x = 121,284.39

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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.