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Finding the Fourth Proportional to 70,809.16, 106,219.20 and 18,219.16

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Solution

The fourth proportional to 70,809.16, 106,219.20 and 18,219.16 is: 27,330.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,809.16 : 106,219.20 = 18,219.16 : x
  2. Step 2: Convert to fraction form
    70,809.16/106,219.20 = 18,219.16/x
  3. Step 3: Cross multiply
    70,809.16x = 106,219.20 × 18,219.16
  4. Step 4: Simplify right side
    70,809.16x = 1,935,224,599.87
  5. Step 5: Solve for x
    x = 1,935,224,599.87/70,809.16
  6. Step 6: Final answer
    x = 27,330.14

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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.