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Finding the Fourth Proportional to 128,000.96, 191,999.46 and 56,904.93

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Solution

The fourth proportional to 128,000.96, 191,999.46 and 56,904.93 is: 85,356.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.96 : 191,999.46 = 56,904.93 : x
  2. Step 2: Convert to fraction form
    128,000.96/191,999.46 = 56,904.93/x
  3. Step 3: Cross multiply
    128,000.96x = 191,999.46 × 56,904.93
  4. Step 4: Simplify right side
    128,000.96x = 10,925,716,044.73
  5. Step 5: Solve for x
    x = 10,925,716,044.73/128,000.96
  6. Step 6: Final answer
    x = 85,356.52

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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.