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Finding the Fourth Proportional to 70,802.10, 106,203.15 and 18,212.04

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Solution

The fourth proportional to 70,802.10, 106,203.15 and 18,212.04 is: 27,318.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,802.10 : 106,203.15 = 18,212.04 : x
  2. Step 2: Convert to fraction form
    70,802.10/106,203.15 = 18,212.04/x
  3. Step 3: Cross multiply
    70,802.10x = 106,203.15 × 18,212.04
  4. Step 4: Simplify right side
    70,802.10x = 1,934,176,015.93
  5. Step 5: Solve for x
    x = 1,934,176,015.93/70,802.10
  6. Step 6: Final answer
    x = 27,318.06

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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.