Home / 156,931.87-216,563.41-85,313.70

Finding the Fourth Proportional to 156,931.87, 216,563.41 and 85,313.70

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Solution

The fourth proportional to 156,931.87, 216,563.41 and 85,313.70 is: 117,731.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931.87 : 216,563.41 = 85,313.70 : x
  2. Step 2: Convert to fraction form
    156,931.87/216,563.41 = 85,313.70/x
  3. Step 3: Cross multiply
    156,931.87x = 216,563.41 × 85,313.70
  4. Step 4: Simplify right side
    156,931.87x = 18,475,825,791.72
  5. Step 5: Solve for x
    x = 18,475,825,791.72/156,931.87
  6. Step 6: Final answer
    x = 117,731.51

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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.