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Finding the Fourth Proportional to 85,953.60, 128,877.36 and 29,780.64

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Solution

The fourth proportional to 85,953.60, 128,877.36 and 29,780.64 is: 44,652.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,953.60 : 128,877.36 = 29,780.64 : x
  2. Step 2: Convert to fraction form
    85,953.60/128,877.36 = 29,780.64/x
  3. Step 3: Cross multiply
    85,953.60x = 128,877.36 × 29,780.64
  4. Step 4: Simplify right side
    85,953.60x = 3,838,050,262.31
  5. Step 5: Solve for x
    x = 3,838,050,262.31/85,953.60
  6. Step 6: Final answer
    x = 44,652.58

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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.