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Finding the Fourth Proportional to 191,143.50, 286,749.84 and 78,761.22

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Solution

The fourth proportional to 191,143.50, 286,749.84 and 78,761.22 is: 118,156.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,143.50 : 286,749.84 = 78,761.22 : x
  2. Step 2: Convert to fraction form
    191,143.50/286,749.84 = 78,761.22/x
  3. Step 3: Cross multiply
    191,143.50x = 286,749.84 × 78,761.22
  4. Step 4: Simplify right side
    191,143.50x = 22,584,767,233.20
  5. Step 5: Solve for x
    x = 22,584,767,233.20/191,143.50
  6. Step 6: Final answer
    x = 118,156.08

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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.