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Finding the Fourth Proportional to 78,322.76, 108,005.92 and 67,029.72

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Solution

The fourth proportional to 78,322.76, 108,005.92 and 67,029.72 is: 92,432.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,322.76 : 108,005.92 = 67,029.72 : x
  2. Step 2: Convert to fraction form
    78,322.76/108,005.92 = 67,029.72/x
  3. Step 3: Cross multiply
    78,322.76x = 108,005.92 × 67,029.72
  4. Step 4: Simplify right side
    78,322.76x = 7,239,606,575.94
  5. Step 5: Solve for x
    x = 7,239,606,575.94/78,322.76
  6. Step 6: Final answer
    x = 92,432.99

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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.