Home / 138,318.25-190,877.30-77,889.62

Finding the Fourth Proportional to 138,318.25, 190,877.30 and 77,889.62

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Solution

The fourth proportional to 138,318.25, 190,877.30 and 77,889.62 is: 107,486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,318.25 : 190,877.30 = 77,889.62 : x
  2. Step 2: Convert to fraction form
    138,318.25/190,877.30 = 77,889.62/x
  3. Step 3: Cross multiply
    138,318.25x = 190,877.30 × 77,889.62
  4. Step 4: Simplify right side
    138,318.25x = 14,867,360,363.63
  5. Step 5: Solve for x
    x = 14,867,360,363.63/138,318.25
  6. Step 6: Final answer
    x = 107,486.61

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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.