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Finding the Fourth Proportional to 136,873.50, 188,885.52 and 77,257.50

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Solution

The fourth proportional to 136,873.50, 188,885.52 and 77,257.50 is: 106,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,873.50 : 188,885.52 = 77,257.50 : x
  2. Step 2: Convert to fraction form
    136,873.50/188,885.52 = 77,257.50/x
  3. Step 3: Cross multiply
    136,873.50x = 188,885.52 × 77,257.50
  4. Step 4: Simplify right side
    136,873.50x = 14,592,823,061.40
  5. Step 5: Solve for x
    x = 14,592,823,061.40/136,873.50
  6. Step 6: Final answer
    x = 106,615.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.