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Finding the Fourth Proportional to 156,318.30, 215,719.45 and 84,698.30

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Solution

The fourth proportional to 156,318.30, 215,719.45 and 84,698.30 is: 116,883.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,318.30 : 215,719.45 = 84,698.30 : x
  2. Step 2: Convert to fraction form
    156,318.30/215,719.45 = 84,698.30/x
  3. Step 3: Cross multiply
    156,318.30x = 215,719.45 × 84,698.30
  4. Step 4: Simplify right side
    156,318.30x = 18,271,071,019.49
  5. Step 5: Solve for x
    x = 18,271,071,019.49/156,318.30
  6. Step 6: Final answer
    x = 116,883.76

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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.