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Finding the Fourth Proportional to 128,478.46, 192,703.86 and 33,718.14

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Solution

The fourth proportional to 128,478.46, 192,703.86 and 33,718.14 is: 50,573.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,478.46 : 192,703.86 = 33,718.14 : x
  2. Step 2: Convert to fraction form
    128,478.46/192,703.86 = 33,718.14/x
  3. Step 3: Cross multiply
    128,478.46x = 192,703.86 × 33,718.14
  4. Step 4: Simplify right side
    128,478.46x = 6,497,615,730.02
  5. Step 5: Solve for x
    x = 6,497,615,730.02/128,478.46
  6. Step 6: Final answer
    x = 50,573.58

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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.