Home / 138,284.35-190,836.01-77,857.21

Finding the Fourth Proportional to 138,284.35, 190,836.01 and 77,857.21

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Solution

The fourth proportional to 138,284.35, 190,836.01 and 77,857.21 is: 107,444.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,284.35 : 190,836.01 = 77,857.21 : x
  2. Step 2: Convert to fraction form
    138,284.35/190,836.01 = 77,857.21/x
  3. Step 3: Cross multiply
    138,284.35x = 190,836.01 × 77,857.21
  4. Step 4: Simplify right side
    138,284.35x = 14,857,959,306.13
  5. Step 5: Solve for x
    x = 14,857,959,306.13/138,284.35
  6. Step 6: Final answer
    x = 107,444.98

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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.