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Finding the Fourth Proportional to 111,508.25, 154,009.15 and 73,438.04

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Solution

The fourth proportional to 111,508.25, 154,009.15 and 73,438.04 is: 101,428.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,508.25 : 154,009.15 = 73,438.04 : x
  2. Step 2: Convert to fraction form
    111,508.25/154,009.15 = 73,438.04/x
  3. Step 3: Cross multiply
    111,508.25x = 154,009.15 × 73,438.04
  4. Step 4: Simplify right side
    111,508.25x = 11,310,130,319.49
  5. Step 5: Solve for x
    x = 11,310,130,319.49/111,508.25
  6. Step 6: Final answer
    x = 101,428.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.