Home / 138,725.40-208,088.10-45,231.15

Finding the Fourth Proportional to 138,725.40, 208,088.10 and 45,231.15

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Solution

The fourth proportional to 138,725.40, 208,088.10 and 45,231.15 is: 67,846.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,725.40 : 208,088.10 = 45,231.15 : x
  2. Step 2: Convert to fraction form
    138,725.40/208,088.10 = 45,231.15/x
  3. Step 3: Cross multiply
    138,725.40x = 208,088.10 × 45,231.15
  4. Step 4: Simplify right side
    138,725.40x = 9,412,064,064.32
  5. Step 5: Solve for x
    x = 9,412,064,064.32/138,725.40
  6. Step 6: Final answer
    x = 67,846.73

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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.