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Finding the Fourth Proportional to 157,511.74, 217,371.45 and 85,895.68

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Solution

The fourth proportional to 157,511.74, 217,371.45 and 85,895.68 is: 118,538.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,511.74 : 217,371.45 = 85,895.68 : x
  2. Step 2: Convert to fraction form
    157,511.74/217,371.45 = 85,895.68/x
  3. Step 3: Cross multiply
    157,511.74x = 217,371.45 × 85,895.68
  4. Step 4: Simplify right side
    157,511.74x = 18,671,268,510.34
  5. Step 5: Solve for x
    x = 18,671,268,510.34/157,511.74
  6. Step 6: Final answer
    x = 118,538.90

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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.