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Finding the Fourth Proportional to 88,712.90, 133,069.35 and 81,455.30

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Solution

The fourth proportional to 88,712.90, 133,069.35 and 81,455.30 is: 122,182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,712.90 : 133,069.35 = 81,455.30 : x
  2. Step 2: Convert to fraction form
    88,712.90/133,069.35 = 81,455.30/x
  3. Step 3: Cross multiply
    88,712.90x = 133,069.35 × 81,455.30
  4. Step 4: Simplify right side
    88,712.90x = 10,839,203,825.06
  5. Step 5: Solve for x
    x = 10,839,203,825.06/88,712.90
  6. Step 6: Final answer
    x = 122,182.95

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1.5x scale

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.