Home / 156,405.72-215,840.04-84,785.68

Finding the Fourth Proportional to 156,405.72, 215,840.04 and 84,785.68

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Solution

The fourth proportional to 156,405.72, 215,840.04 and 84,785.68 is: 117,004.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,405.72 : 215,840.04 = 84,785.68 : x
  2. Step 2: Convert to fraction form
    156,405.72/215,840.04 = 84,785.68/x
  3. Step 3: Cross multiply
    156,405.72x = 215,840.04 × 84,785.68
  4. Step 4: Simplify right side
    156,405.72x = 18,300,144,562.63
  5. Step 5: Solve for x
    x = 18,300,144,562.63/156,405.72
  6. Step 6: Final answer
    x = 117,004.32

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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.