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Finding the Fourth Proportional to 76,478.56, 105,481.92 and 67,030.72

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Solution

The fourth proportional to 76,478.56, 105,481.92 and 67,030.72 is: 92,451.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,478.56 : 105,481.92 = 67,030.72 : x
  2. Step 2: Convert to fraction form
    76,478.56/105,481.92 = 67,030.72/x
  3. Step 3: Cross multiply
    76,478.56x = 105,481.92 × 67,030.72
  4. Step 4: Simplify right side
    76,478.56x = 7,070,529,044.58
  5. Step 5: Solve for x
    x = 7,070,529,044.58/76,478.56
  6. Step 6: Final answer
    x = 92,451.13

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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.