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Finding the Fourth Proportional to 117,193.66, 161,715.69 and 65,501.21

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Solution

The fourth proportional to 117,193.66, 161,715.69 and 65,501.21 is: 90,385.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,193.66 : 161,715.69 = 65,501.21 : x
  2. Step 2: Convert to fraction form
    117,193.66/161,715.69 = 65,501.21/x
  3. Step 3: Cross multiply
    117,193.66x = 161,715.69 × 65,501.21
  4. Step 4: Simplify right side
    117,193.66x = 10,592,573,775.27
  5. Step 5: Solve for x
    x = 10,592,573,775.27/117,193.66
  6. Step 6: Final answer
    x = 90,385.21

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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.