Home / 78,429.56-117,666.30-31,715.24

Finding the Fourth Proportional to 78,429.56, 117,666.30 and 31,715.24

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Solution

The fourth proportional to 78,429.56, 117,666.30 and 31,715.24 is: 47,581.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,429.56 : 117,666.30 = 31,715.24 : x
  2. Step 2: Convert to fraction form
    78,429.56/117,666.30 = 31,715.24/x
  3. Step 3: Cross multiply
    78,429.56x = 117,666.30 × 31,715.24
  4. Step 4: Simplify right side
    78,429.56x = 3,731,814,944.41
  5. Step 5: Solve for x
    x = 3,731,814,944.41/78,429.56
  6. Step 6: Final answer
    x = 47,581.74

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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.