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Finding the Fourth Proportional to 156,260.36, 215,639.20 and 84,640.20

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Solution

The fourth proportional to 156,260.36, 215,639.20 and 84,640.20 is: 116,803.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,260.36 : 215,639.20 = 84,640.20 : x
  2. Step 2: Convert to fraction form
    156,260.36/215,639.20 = 84,640.20/x
  3. Step 3: Cross multiply
    156,260.36x = 215,639.20 × 84,640.20
  4. Step 4: Simplify right side
    156,260.36x = 18,251,745,015.84
  5. Step 5: Solve for x
    x = 18,251,745,015.84/156,260.36
  6. Step 6: Final answer
    x = 116,803.42

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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.