Home / 157,765.40-217,717.05-86,145.42

Finding the Fourth Proportional to 157,765.40, 217,717.05 and 86,145.42

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Solution

The fourth proportional to 157,765.40, 217,717.05 and 86,145.42 is: 118,881.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,765.40 : 217,717.05 = 86,145.42 : x
  2. Step 2: Convert to fraction form
    157,765.40/217,717.05 = 86,145.42/x
  3. Step 3: Cross multiply
    157,765.40x = 217,717.05 × 86,145.42
  4. Step 4: Simplify right side
    157,765.40x = 18,755,325,808.87
  5. Step 5: Solve for x
    x = 18,755,325,808.87/157,765.40
  6. Step 6: Final answer
    x = 118,881.11

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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.