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Finding the Fourth Proportional to 128,156.64, 192,269.52 and 115,818.72

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Solution

The fourth proportional to 128,156.64, 192,269.52 and 115,818.72 is: 173,759.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,156.64 : 192,269.52 = 115,818.72 : x
  2. Step 2: Convert to fraction form
    128,156.64/192,269.52 = 115,818.72/x
  3. Step 3: Cross multiply
    128,156.64x = 192,269.52 × 115,818.72
  4. Step 4: Simplify right side
    128,156.64x = 22,268,409,701.41
  5. Step 5: Solve for x
    x = 22,268,409,701.41/128,156.64
  6. Step 6: Final answer
    x = 173,759.31

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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.