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Finding the Fourth Proportional to 157,316.54, 217,089.80 and 91,911.42

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Solution

The fourth proportional to 157,316.54, 217,089.80 and 91,911.42 is: 126,833.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,316.54 : 217,089.80 = 91,911.42 : x
  2. Step 2: Convert to fraction form
    157,316.54/217,089.80 = 91,911.42/x
  3. Step 3: Cross multiply
    157,316.54x = 217,089.80 × 91,911.42
  4. Step 4: Simplify right side
    157,316.54x = 19,953,031,325.96
  5. Step 5: Solve for x
    x = 19,953,031,325.96/157,316.54
  6. Step 6: Final answer
    x = 126,833.66

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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.