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Finding the Fourth Proportional to 70,913.52, 106,369.95 and 20,993.91

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Solution

The fourth proportional to 70,913.52, 106,369.95 and 20,993.91 is: 31,490.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,913.52 : 106,369.95 = 20,993.91 : x
  2. Step 2: Convert to fraction form
    70,913.52/106,369.95 = 20,993.91/x
  3. Step 3: Cross multiply
    70,913.52x = 106,369.95 × 20,993.91
  4. Step 4: Simplify right side
    70,913.52x = 2,233,121,157.00
  5. Step 5: Solve for x
    x = 2,233,121,157.00/70,913.52
  6. Step 6: Final answer
    x = 31,490.77

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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.