Home / 138,619.08-191,282.82-78,204.52

Finding the Fourth Proportional to 138,619.08, 191,282.82 and 78,204.52

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Solution

The fourth proportional to 138,619.08, 191,282.82 and 78,204.52 is: 107,915.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,619.08 : 191,282.82 = 78,204.52 : x
  2. Step 2: Convert to fraction form
    138,619.08/191,282.82 = 78,204.52/x
  3. Step 3: Cross multiply
    138,619.08x = 191,282.82 × 78,204.52
  4. Step 4: Simplify right side
    138,619.08x = 14,959,181,068.18
  5. Step 5: Solve for x
    x = 14,959,181,068.18/138,619.08
  6. Step 6: Final answer
    x = 107,915.74

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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.