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Finding the Fourth Proportional to 70,426.62, 105,639.87 and 17,118.30

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Solution

The fourth proportional to 70,426.62, 105,639.87 and 17,118.30 is: 25,677.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,426.62 : 105,639.87 = 17,118.30 : x
  2. Step 2: Convert to fraction form
    70,426.62/105,639.87 = 17,118.30/x
  3. Step 3: Cross multiply
    70,426.62x = 105,639.87 × 17,118.30
  4. Step 4: Simplify right side
    70,426.62x = 1,808,374,986.62
  5. Step 5: Solve for x
    x = 1,808,374,986.62/70,426.62
  6. Step 6: Final answer
    x = 25,677.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.