Home / 138,962.34-191,775.60-78,535.53

Finding the Fourth Proportional to 138,962.34, 191,775.60 and 78,535.53

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Solution

The fourth proportional to 138,962.34, 191,775.60 and 78,535.53 is: 108,383.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,962.34 : 191,775.60 = 78,535.53 : x
  2. Step 2: Convert to fraction form
    138,962.34/191,775.60 = 78,535.53/x
  3. Step 3: Cross multiply
    138,962.34x = 191,775.60 × 78,535.53
  4. Step 4: Simplify right side
    138,962.34x = 15,061,198,387.07
  5. Step 5: Solve for x
    x = 15,061,198,387.07/138,962.34
  6. Step 6: Final answer
    x = 108,383.31

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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.