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Finding the Fourth Proportional to 99,893.28, 148,994.52 and 86,640.24

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Solution

The fourth proportional to 99,893.28, 148,994.52 and 86,640.24 is: 129,227.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,893.28 : 148,994.52 = 86,640.24 : x
  2. Step 2: Convert to fraction form
    99,893.28/148,994.52 = 86,640.24/x
  3. Step 3: Cross multiply
    99,893.28x = 148,994.52 × 86,640.24
  4. Step 4: Simplify right side
    99,893.28x = 12,908,920,971.48
  5. Step 5: Solve for x
    x = 12,908,920,971.48/99,893.28
  6. Step 6: Final answer
    x = 129,227.12

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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.