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Finding the Fourth Proportional to 170,655.60, 256,129.20 and 76,031.40

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Solution

The fourth proportional to 170,655.60, 256,129.20 and 76,031.40 is: 114,112.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,655.60 : 256,129.20 = 76,031.40 : x
  2. Step 2: Convert to fraction form
    170,655.60/256,129.20 = 76,031.40/x
  3. Step 3: Cross multiply
    170,655.60x = 256,129.20 × 76,031.40
  4. Step 4: Simplify right side
    170,655.60x = 19,473,861,656.88
  5. Step 5: Solve for x
    x = 19,473,861,656.88/170,655.60
  6. Step 6: Final answer
    x = 114,112.06

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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.