Home / 138,770.50-191,507.96-85,045.16

Finding the Fourth Proportional to 138,770.50, 191,507.96 and 85,045.16

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Solution

The fourth proportional to 138,770.50, 191,507.96 and 85,045.16 is: 117,365.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,770.50 : 191,507.96 = 85,045.16 : x
  2. Step 2: Convert to fraction form
    138,770.50/191,507.96 = 85,045.16/x
  3. Step 3: Cross multiply
    138,770.50x = 191,507.96 × 85,045.16
  4. Step 4: Simplify right side
    138,770.50x = 16,286,825,099.47
  5. Step 5: Solve for x
    x = 16,286,825,099.47/138,770.50
  6. Step 6: Final answer
    x = 117,365.18

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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.