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Finding the Fourth Proportional to 156,091.28, 215,406.50 and 84,471.28

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Solution

The fourth proportional to 156,091.28, 215,406.50 and 84,471.28 is: 116,570.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,091.28 : 215,406.50 = 84,471.28 : x
  2. Step 2: Convert to fraction form
    156,091.28/215,406.50 = 84,471.28/x
  3. Step 3: Cross multiply
    156,091.28x = 215,406.50 × 84,471.28
  4. Step 4: Simplify right side
    156,091.28x = 18,195,662,775.32
  5. Step 5: Solve for x
    x = 18,195,662,775.32/156,091.28
  6. Step 6: Final answer
    x = 116,570.66

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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.