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Finding the Fourth Proportional to 135,871.74, 187,507.85 and 75,443.40

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Solution

The fourth proportional to 135,871.74, 187,507.85 and 75,443.40 is: 104,114.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,871.74 : 187,507.85 = 75,443.40 : x
  2. Step 2: Convert to fraction form
    135,871.74/187,507.85 = 75,443.40/x
  3. Step 3: Cross multiply
    135,871.74x = 187,507.85 × 75,443.40
  4. Step 4: Simplify right side
    135,871.74x = 14,146,229,353.47
  5. Step 5: Solve for x
    x = 14,146,229,353.47/135,871.74
  6. Step 6: Final answer
    x = 104,114.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.