Home / 157,638.25-217,540-86,018.05

Finding the Fourth Proportional to 157,638.25, 217,540 and 86,018.05

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Solution

The fourth proportional to 157,638.25, 217,540 and 86,018.05 is: 118,704.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,638.25 : 217,540 = 86,018.05 : x
  2. Step 2: Convert to fraction form
    157,638.25/217,540 = 86,018.05/x
  3. Step 3: Cross multiply
    157,638.25x = 217,540 × 86,018.05
  4. Step 4: Simplify right side
    157,638.25x = 18,712,366,597
  5. Step 5: Solve for x
    x = 18,712,366,597/157,638.25
  6. Step 6: Final answer
    x = 118,704.48

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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.