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Finding the Fourth Proportional to 171,387.90, 257,134.37 and 76,697.79

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Solution

The fourth proportional to 171,387.90, 257,134.37 and 76,697.79 is: 115,070.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,387.90 : 257,134.37 = 76,697.79 : x
  2. Step 2: Convert to fraction form
    171,387.90/257,134.37 = 76,697.79/x
  3. Step 3: Cross multiply
    171,387.90x = 257,134.37 × 76,697.79
  4. Step 4: Simplify right side
    171,387.90x = 19,721,637,528.55
  5. Step 5: Solve for x
    x = 19,721,637,528.55/171,387.90
  6. Step 6: Final answer
    x = 115,070.19

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1.5x scale

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.