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Finding the Fourth Proportional to 88,920.80, 133,053.15 and 81,047.60

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Solution

The fourth proportional to 88,920.80, 133,053.15 and 81,047.60 is: 121,272.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,920.80 : 133,053.15 = 81,047.60 : x
  2. Step 2: Convert to fraction form
    88,920.80/133,053.15 = 81,047.60/x
  3. Step 3: Cross multiply
    88,920.80x = 133,053.15 × 81,047.60
  4. Step 4: Simplify right side
    88,920.80x = 10,783,638,479.94
  5. Step 5: Solve for x
    x = 10,783,638,479.94/88,920.80
  6. Step 6: Final answer
    x = 121,272.40

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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.