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Finding the Fourth Proportional to 117,341.54, 161,931.12 and 65,658.68

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Solution

The fourth proportional to 117,341.54, 161,931.12 and 65,658.68 is: 90,608.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,341.54 : 161,931.12 = 65,658.68 : x
  2. Step 2: Convert to fraction form
    117,341.54/161,931.12 = 65,658.68/x
  3. Step 3: Cross multiply
    117,341.54x = 161,931.12 × 65,658.68
  4. Step 4: Simplify right side
    117,341.54x = 10,632,183,590.12
  5. Step 5: Solve for x
    x = 10,632,183,590.12/117,341.54
  6. Step 6: Final answer
    x = 90,608.86

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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.