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Finding the Fourth Proportional to 191,820.72, 287,530.40 and 65,416.66

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Solution

The fourth proportional to 191,820.72, 287,530.40 and 65,416.66 is: 98,056.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,820.72 : 287,530.40 = 65,416.66 : x
  2. Step 2: Convert to fraction form
    191,820.72/287,530.40 = 65,416.66/x
  3. Step 3: Cross multiply
    191,820.72x = 287,530.40 × 65,416.66
  4. Step 4: Simplify right side
    191,820.72x = 18,809,278,416.46
  5. Step 5: Solve for x
    x = 18,809,278,416.46/191,820.72
  6. Step 6: Final answer
    x = 98,056.55

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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.