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Finding the Fourth Proportional to 157,713.51, 217,636.33 and 86,079.63

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Solution

The fourth proportional to 157,713.51, 217,636.33 and 86,079.63 is: 118,785.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,713.51 : 217,636.33 = 86,079.63 : x
  2. Step 2: Convert to fraction form
    157,713.51/217,636.33 = 86,079.63/x
  3. Step 3: Cross multiply
    157,713.51x = 217,636.33 × 86,079.63
  4. Step 4: Simplify right side
    157,713.51x = 18,734,054,760.96
  5. Step 5: Solve for x
    x = 18,734,054,760.96/157,713.51
  6. Step 6: Final answer
    x = 118,785.35

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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.