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Finding the Fourth Proportional to 157,610.88, 217,583.28 and 121,720.32

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Solution

The fourth proportional to 157,610.88, 217,583.28 and 121,720.32 is: 168,036.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,610.88 : 217,583.28 = 121,720.32 : x
  2. Step 2: Convert to fraction form
    157,610.88/217,583.28 = 121,720.32/x
  3. Step 3: Cross multiply
    157,610.88x = 217,583.28 × 121,720.32
  4. Step 4: Simplify right side
    157,610.88x = 26,484,306,468.25
  5. Step 5: Solve for x
    x = 26,484,306,468.25/157,610.88
  6. Step 6: Final answer
    x = 168,036.03

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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.