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Finding the Fourth Proportional to 157,721.67, 217,655.80 and 86,101.67

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Solution

The fourth proportional to 157,721.67, 217,655.80 and 86,101.67 is: 118,820.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,721.67 : 217,655.80 = 86,101.67 : x
  2. Step 2: Convert to fraction form
    157,721.67/217,655.80 = 86,101.67/x
  3. Step 3: Cross multiply
    157,721.67x = 217,655.80 × 86,101.67
  4. Step 4: Simplify right side
    157,721.67x = 18,740,527,865.19
  5. Step 5: Solve for x
    x = 18,740,527,865.19/157,721.67
  6. Step 6: Final answer
    x = 118,820.25

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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.