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Finding the Fourth Proportional to 157,653, 217,565.73 and 86,037.60

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Solution

The fourth proportional to 157,653, 217,565.73 and 86,037.60 is: 118,734.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,653 : 217,565.73 = 86,037.60 : x
  2. Step 2: Convert to fraction form
    157,653/217,565.73 = 86,037.60/x
  3. Step 3: Cross multiply
    157,653x = 217,565.73 × 86,037.60
  4. Step 4: Simplify right side
    157,653x = 18,718,833,251.45
  5. Step 5: Solve for x
    x = 18,718,833,251.45/157,653
  6. Step 6: Final answer
    x = 118,734.39

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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.