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Finding the Fourth Proportional to 191,881.70, 287,563.35 and 128,521.70

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Solution

The fourth proportional to 191,881.70, 287,563.35 and 128,521.70 is: 192,608.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,881.70 : 287,563.35 = 128,521.70 : x
  2. Step 2: Convert to fraction form
    191,881.70/287,563.35 = 128,521.70/x
  3. Step 3: Cross multiply
    191,881.70x = 287,563.35 × 128,521.70
  4. Step 4: Simplify right side
    191,881.70x = 36,958,130,599.70
  5. Step 5: Solve for x
    x = 36,958,130,599.70/191,881.70
  6. Step 6: Final answer
    x = 192,608.94

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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.