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Finding the Fourth Proportional to 157,679.16, 217,597.84 and 86,060.76

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Solution

The fourth proportional to 157,679.16, 217,597.84 and 86,060.76 is: 118,764.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,679.16 : 217,597.84 = 86,060.76 : x
  2. Step 2: Convert to fraction form
    157,679.16/217,597.84 = 86,060.76/x
  3. Step 3: Cross multiply
    157,679.16x = 217,597.84 × 86,060.76
  4. Step 4: Simplify right side
    157,679.16x = 18,726,635,484.76
  5. Step 5: Solve for x
    x = 18,726,635,484.76/157,679.16
  6. Step 6: Final answer
    x = 118,764.18

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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.