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Finding the Fourth Proportional to 138,325.29, 189,644.70 and 135,803.40

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Solution

The fourth proportional to 138,325.29, 189,644.70 and 135,803.40 is: 186,187.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,325.29 : 189,644.70 = 135,803.40 : x
  2. Step 2: Convert to fraction form
    138,325.29/189,644.70 = 135,803.40/x
  3. Step 3: Cross multiply
    138,325.29x = 189,644.70 × 135,803.40
  4. Step 4: Simplify right side
    138,325.29x = 25,754,395,051.98
  5. Step 5: Solve for x
    x = 25,754,395,051.98/138,325.29
  6. Step 6: Final answer
    x = 186,187.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.