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Finding the Fourth Proportional to 135,973.60, 203,960.40 and 85,891.30

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Solution

The fourth proportional to 135,973.60, 203,960.40 and 85,891.30 is: 128,836.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,973.60 : 203,960.40 = 85,891.30 : x
  2. Step 2: Convert to fraction form
    135,973.60/203,960.40 = 85,891.30/x
  3. Step 3: Cross multiply
    135,973.60x = 203,960.40 × 85,891.30
  4. Step 4: Simplify right side
    135,973.60x = 17,518,423,904.52
  5. Step 5: Solve for x
    x = 17,518,423,904.52/135,973.60
  6. Step 6: Final answer
    x = 128,836.95

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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.