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Finding the Fourth Proportional to 156,300.84, 215,695.36 and 84,680.86

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Solution

The fourth proportional to 156,300.84, 215,695.36 and 84,680.86 is: 116,859.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,300.84 : 215,695.36 = 84,680.86 : x
  2. Step 2: Convert to fraction form
    156,300.84/215,695.36 = 84,680.86/x
  3. Step 3: Cross multiply
    156,300.84x = 215,695.36 × 84,680.86
  4. Step 4: Simplify right side
    156,300.84x = 18,265,268,043.57
  5. Step 5: Solve for x
    x = 18,265,268,043.57/156,300.84
  6. Step 6: Final answer
    x = 116,859.70

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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.