Home / 171,921.85-257,938.80-86,488.62

Finding the Fourth Proportional to 171,921.85, 257,938.80 and 86,488.62

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Solution

The fourth proportional to 171,921.85, 257,938.80 and 86,488.62 is: 129,761.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,921.85 : 257,938.80 = 86,488.62 : x
  2. Step 2: Convert to fraction form
    171,921.85/257,938.80 = 86,488.62/x
  3. Step 3: Cross multiply
    171,921.85x = 257,938.80 × 86,488.62
  4. Step 4: Simplify right side
    171,921.85x = 22,308,769,566.76
  5. Step 5: Solve for x
    x = 22,308,769,566.76/171,921.85
  6. Step 6: Final answer
    x = 129,761.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.