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Finding the Fourth Proportional to 78,372.52, 108,080.94 and 60,438.76

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Solution

The fourth proportional to 78,372.52, 108,080.94 and 60,438.76 is: 83,349.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,372.52 : 108,080.94 = 60,438.76 : x
  2. Step 2: Convert to fraction form
    78,372.52/108,080.94 = 60,438.76/x
  3. Step 3: Cross multiply
    78,372.52x = 108,080.94 × 60,438.76
  4. Step 4: Simplify right side
    78,372.52x = 6,532,277,993.23
  5. Step 5: Solve for x
    x = 6,532,277,993.23/78,372.52
  6. Step 6: Final answer
    x = 83,349.09

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1.5x scale

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.