Home / 157,918.16-217,917.78-86,298.72

Finding the Fourth Proportional to 157,918.16, 217,917.78 and 86,298.72

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Solution

The fourth proportional to 157,918.16, 217,917.78 and 86,298.72 is: 119,087.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,918.16 : 217,917.78 = 86,298.72 : x
  2. Step 2: Convert to fraction form
    157,918.16/217,917.78 = 86,298.72/x
  3. Step 3: Cross multiply
    157,918.16x = 217,917.78 × 86,298.72
  4. Step 4: Simplify right side
    157,918.16x = 18,806,025,479.24
  5. Step 5: Solve for x
    x = 18,806,025,479.24/157,918.16
  6. Step 6: Final answer
    x = 119,087.16

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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.