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Finding the Fourth Proportional to 93,518.72, 128,976.08 and 79,052.98

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Solution

The fourth proportional to 93,518.72, 128,976.08 and 79,052.98 is: 109,025.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,518.72 : 128,976.08 = 79,052.98 : x
  2. Step 2: Convert to fraction form
    93,518.72/128,976.08 = 79,052.98/x
  3. Step 3: Cross multiply
    93,518.72x = 128,976.08 × 79,052.98
  4. Step 4: Simplify right side
    93,518.72x = 10,195,943,472.72
  5. Step 5: Solve for x
    x = 10,195,943,472.72/93,518.72
  6. Step 6: Final answer
    x = 109,025.70

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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.