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Finding the Fourth Proportional to 191,720.66, 287,399.54 and 79,330.73

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Solution

The fourth proportional to 191,720.66, 287,399.54 and 79,330.73 is: 118,921.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,720.66 : 287,399.54 = 79,330.73 : x
  2. Step 2: Convert to fraction form
    191,720.66/287,399.54 = 79,330.73/x
  3. Step 3: Cross multiply
    191,720.66x = 287,399.54 × 79,330.73
  4. Step 4: Simplify right side
    191,720.66x = 22,799,614,071.19
  5. Step 5: Solve for x
    x = 22,799,614,071.19/191,720.66
  6. Step 6: Final answer
    x = 118,921.01

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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.