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Finding the Fourth Proportional to 127,772.70, 191,313.45 and 100,124.70

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Solution

The fourth proportional to 127,772.70, 191,313.45 and 100,124.70 is: 149,916.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,772.70 : 191,313.45 = 100,124.70 : x
  2. Step 2: Convert to fraction form
    127,772.70/191,313.45 = 100,124.70/x
  3. Step 3: Cross multiply
    127,772.70x = 191,313.45 × 100,124.70
  4. Step 4: Simplify right side
    127,772.70x = 19,155,201,787.22
  5. Step 5: Solve for x
    x = 19,155,201,787.22/127,772.70
  6. Step 6: Final answer
    x = 149,916.23

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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.