Home / 156,429.08-215,815.56-102,743.20

Finding the Fourth Proportional to 156,429.08, 215,815.56 and 102,743.20

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Solution

The fourth proportional to 156,429.08, 215,815.56 and 102,743.20 is: 141,748.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,429.08 : 215,815.56 = 102,743.20 : x
  2. Step 2: Convert to fraction form
    156,429.08/215,815.56 = 102,743.20/x
  3. Step 3: Cross multiply
    156,429.08x = 215,815.56 × 102,743.20
  4. Step 4: Simplify right side
    156,429.08x = 22,173,581,244.19
  5. Step 5: Solve for x
    x = 22,173,581,244.19/156,429.08
  6. Step 6: Final answer
    x = 141,748.46

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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.