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Finding the Fourth Proportional to 83,689.79, 115,511.82 and 47,900.45

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Solution

The fourth proportional to 83,689.79, 115,511.82 and 47,900.45 is: 66,114.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,689.79 : 115,511.82 = 47,900.45 : x
  2. Step 2: Convert to fraction form
    83,689.79/115,511.82 = 47,900.45/x
  3. Step 3: Cross multiply
    83,689.79x = 115,511.82 × 47,900.45
  4. Step 4: Simplify right side
    83,689.79x = 5,533,067,580.76
  5. Step 5: Solve for x
    x = 5,533,067,580.76/83,689.79
  6. Step 6: Final answer
    x = 66,114.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.