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Finding the Fourth Proportional to 70,878.96, 106,318.90 and 18,288.90

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Solution

The fourth proportional to 70,878.96, 106,318.90 and 18,288.90 is: 27,433.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,878.96 : 106,318.90 = 18,288.90 : x
  2. Step 2: Convert to fraction form
    70,878.96/106,318.90 = 18,288.90/x
  3. Step 3: Cross multiply
    70,878.96x = 106,318.90 × 18,288.90
  4. Step 4: Simplify right side
    70,878.96x = 1,944,455,730.21
  5. Step 5: Solve for x
    x = 1,944,455,730.21/70,878.96
  6. Step 6: Final answer
    x = 27,433.47

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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.