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Finding the Fourth Proportional to 191,455.81, 287,005.32 and 65,009.57

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Solution

The fourth proportional to 191,455.81, 287,005.32 and 65,009.57 is: 97,453.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,455.81 : 287,005.32 = 65,009.57 : x
  2. Step 2: Convert to fraction form
    191,455.81/287,005.32 = 65,009.57/x
  3. Step 3: Cross multiply
    191,455.81x = 287,005.32 × 65,009.57
  4. Step 4: Simplify right side
    191,455.81x = 18,658,092,671.59
  5. Step 5: Solve for x
    x = 18,658,092,671.59/191,455.81
  6. Step 6: Final answer
    x = 97,453.78

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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.