Home / 157,688.40-217,602-86,067.84

Finding the Fourth Proportional to 157,688.40, 217,602 and 86,067.84

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Solution

The fourth proportional to 157,688.40, 217,602 and 86,067.84 is: 118,769.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,688.40 : 217,602 = 86,067.84 : x
  2. Step 2: Convert to fraction form
    157,688.40/217,602 = 86,067.84/x
  3. Step 3: Cross multiply
    157,688.40x = 217,602 × 86,067.84
  4. Step 4: Simplify right side
    157,688.40x = 18,728,534,119.68
  5. Step 5: Solve for x
    x = 18,728,534,119.68/157,688.40
  6. Step 6: Final answer
    x = 118,769.26

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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.