Home / 138,863.16-191,634.66-85,177.78

Finding the Fourth Proportional to 138,863.16, 191,634.66 and 85,177.78

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Solution

The fourth proportional to 138,863.16, 191,634.66 and 85,177.78 is: 117,547.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,863.16 : 191,634.66 = 85,177.78 : x
  2. Step 2: Convert to fraction form
    138,863.16/191,634.66 = 85,177.78/x
  3. Step 3: Cross multiply
    138,863.16x = 191,634.66 × 85,177.78
  4. Step 4: Simplify right side
    138,863.16x = 16,323,014,430.77
  5. Step 5: Solve for x
    x = 16,323,014,430.77/138,863.16
  6. Step 6: Final answer
    x = 117,547.48

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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.