Home / 156,423.13-215,749.27-102,688.54

Finding the Fourth Proportional to 156,423.13, 215,749.27 and 102,688.54

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Solution

The fourth proportional to 156,423.13, 215,749.27 and 102,688.54 is: 141,634.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,423.13 : 215,749.27 = 102,688.54 : x
  2. Step 2: Convert to fraction form
    156,423.13/215,749.27 = 102,688.54/x
  3. Step 3: Cross multiply
    156,423.13x = 215,749.27 × 102,688.54
  4. Step 4: Simplify right side
    156,423.13x = 22,154,977,542.37
  5. Step 5: Solve for x
    x = 22,154,977,542.37/156,423.13
  6. Step 6: Final answer
    x = 141,634.92

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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.