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Finding the Fourth Proportional to 128,274.76, 191,472.73 and 113,124.62

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Solution

The fourth proportional to 128,274.76, 191,472.73 and 113,124.62 is: 168,858.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,274.76 : 191,472.73 = 113,124.62 : x
  2. Step 2: Convert to fraction form
    128,274.76/191,472.73 = 113,124.62/x
  3. Step 3: Cross multiply
    128,274.76x = 191,472.73 × 113,124.62
  4. Step 4: Simplify right side
    128,274.76x = 21,660,280,300.29
  5. Step 5: Solve for x
    x = 21,660,280,300.29/128,274.76
  6. Step 6: Final answer
    x = 168,858.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.