Home / 138,876.40-191,676.36-91,128.16

Finding the Fourth Proportional to 138,876.40, 191,676.36 and 91,128.16

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Solution

The fourth proportional to 138,876.40, 191,676.36 and 91,128.16 is: 125,774.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,876.40 : 191,676.36 = 91,128.16 : x
  2. Step 2: Convert to fraction form
    138,876.40/191,676.36 = 91,128.16/x
  3. Step 3: Cross multiply
    138,876.40x = 191,676.36 × 91,128.16
  4. Step 4: Simplify right side
    138,876.40x = 17,467,114,002.30
  5. Step 5: Solve for x
    x = 17,467,114,002.30/138,876.40
  6. Step 6: Final answer
    x = 125,774.53

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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.