Home / 156,931.20-235,322.64-57,021.72

Finding the Fourth Proportional to 156,931.20, 235,322.64 and 57,021.72

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Solution

The fourth proportional to 156,931.20, 235,322.64 and 57,021.72 is: 85,505.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931.20 : 235,322.64 = 57,021.72 : x
  2. Step 2: Convert to fraction form
    156,931.20/235,322.64 = 57,021.72/x
  3. Step 3: Cross multiply
    156,931.20x = 235,322.64 × 57,021.72
  4. Step 4: Simplify right side
    156,931.20x = 13,418,501,687.74
  5. Step 5: Solve for x
    x = 13,418,501,687.74/156,931.20
  6. Step 6: Final answer
    x = 85,505.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.