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Finding the Fourth Proportional to 191,092.94, 286,639.12 and 85,788.90

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Solution

The fourth proportional to 191,092.94, 286,639.12 and 85,788.90 is: 128,683.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,092.94 : 286,639.12 = 85,788.90 : x
  2. Step 2: Convert to fraction form
    191,092.94/286,639.12 = 85,788.90/x
  3. Step 3: Cross multiply
    191,092.94x = 286,639.12 × 85,788.90
  4. Step 4: Simplify right side
    191,092.94x = 24,590,454,801.77
  5. Step 5: Solve for x
    x = 24,590,454,801.77/191,092.94
  6. Step 6: Final answer
    x = 128,683.22

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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.