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Finding the Fourth Proportional to 93,115.98, 128,650.39 and 64,947.42

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Solution

The fourth proportional to 93,115.98, 128,650.39 and 64,947.42 is: 89,732.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,115.98 : 128,650.39 = 64,947.42 : x
  2. Step 2: Convert to fraction form
    93,115.98/128,650.39 = 64,947.42/x
  3. Step 3: Cross multiply
    93,115.98x = 128,650.39 × 64,947.42
  4. Step 4: Simplify right side
    93,115.98x = 8,355,510,912.49
  5. Step 5: Solve for x
    x = 8,355,510,912.49/93,115.98
  6. Step 6: Final answer
    x = 89,732.30

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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.