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Finding the Fourth Proportional to 69,439.60, 103,549.64 and 68,808.10

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Solution

The fourth proportional to 69,439.60, 103,549.64 and 68,808.10 is: 102,607.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,439.60 : 103,549.64 = 68,808.10 : x
  2. Step 2: Convert to fraction form
    69,439.60/103,549.64 = 68,808.10/x
  3. Step 3: Cross multiply
    69,439.60x = 103,549.64 × 68,808.10
  4. Step 4: Simplify right side
    69,439.60x = 7,125,053,984.08
  5. Step 5: Solve for x
    x = 7,125,053,984.08/69,439.60
  6. Step 6: Final answer
    x = 102,607.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.