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Finding the Fourth Proportional to 70,989.82, 106,484.63 and 18,399.35

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Solution

The fourth proportional to 70,989.82, 106,484.63 and 18,399.35 is: 27,599.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,989.82 : 106,484.63 = 18,399.35 : x
  2. Step 2: Convert to fraction form
    70,989.82/106,484.63 = 18,399.35/x
  3. Step 3: Cross multiply
    70,989.82x = 106,484.63 × 18,399.35
  4. Step 4: Simplify right side
    70,989.82x = 1,959,248,151.21
  5. Step 5: Solve for x
    x = 1,959,248,151.21/70,989.82
  6. Step 6: Final answer
    x = 27,599.00

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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.