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Finding the Fourth Proportional to 135,485.61, 203,415.00 and 68,972.11

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Solution

The fourth proportional to 135,485.61, 203,415.00 and 68,972.11 is: 103,553.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,485.61 : 203,415.00 = 68,972.11 : x
  2. Step 2: Convert to fraction form
    135,485.61/203,415.00 = 68,972.11/x
  3. Step 3: Cross multiply
    135,485.61x = 203,415.00 × 68,972.11
  4. Step 4: Simplify right side
    135,485.61x = 14,029,960,988.47
  5. Step 5: Solve for x
    x = 14,029,960,988.47/135,485.61
  6. Step 6: Final answer
    x = 103,553.14

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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.