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Finding the Fourth Proportional to 117,856.92, 162,640.86 and 64,864.92

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Solution

The fourth proportional to 117,856.92, 162,640.86 and 64,864.92 is: 89,512.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,856.92 : 162,640.86 = 64,864.92 : x
  2. Step 2: Convert to fraction form
    117,856.92/162,640.86 = 64,864.92/x
  3. Step 3: Cross multiply
    117,856.92x = 162,640.86 × 64,864.92
  4. Step 4: Simplify right side
    117,856.92x = 10,549,686,372.63
  5. Step 5: Solve for x
    x = 10,549,686,372.63/117,856.92
  6. Step 6: Final answer
    x = 89,512.66

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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.