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Finding the Fourth Proportional to 156,924.88, 216,560.56 and 85,309.76

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Solution

The fourth proportional to 156,924.88, 216,560.56 and 85,309.76 is: 117,729.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,924.88 : 216,560.56 = 85,309.76 : x
  2. Step 2: Convert to fraction form
    156,924.88/216,560.56 = 85,309.76/x
  3. Step 3: Cross multiply
    156,924.88x = 216,560.56 × 85,309.76
  4. Step 4: Simplify right side
    156,924.88x = 18,474,729,399.07
  5. Step 5: Solve for x
    x = 18,474,729,399.07/156,924.88
  6. Step 6: Final answer
    x = 117,729.77

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1.5x scale

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.