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Finding the Fourth Proportional to 115,851.68, 159,888.78 and 70,556.21

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Solution

The fourth proportional to 115,851.68, 159,888.78 and 70,556.21 is: 97,375.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,851.68 : 159,888.78 = 70,556.21 : x
  2. Step 2: Convert to fraction form
    115,851.68/159,888.78 = 70,556.21/x
  3. Step 3: Cross multiply
    115,851.68x = 159,888.78 × 70,556.21
  4. Step 4: Simplify right side
    115,851.68x = 11,281,145,538.88
  5. Step 5: Solve for x
    x = 11,281,145,538.88/115,851.68
  6. Step 6: Final answer
    x = 97,375.77

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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.