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Finding the Fourth Proportional to 111,140.64, 153,375.12 and 63,396.81

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Solution

The fourth proportional to 111,140.64, 153,375.12 and 63,396.81 is: 87,488.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,140.64 : 153,375.12 = 63,396.81 : x
  2. Step 2: Convert to fraction form
    111,140.64/153,375.12 = 63,396.81/x
  3. Step 3: Cross multiply
    111,140.64x = 153,375.12 × 63,396.81
  4. Step 4: Simplify right side
    111,140.64x = 9,723,493,341.37
  5. Step 5: Solve for x
    x = 9,723,493,341.37/111,140.64
  6. Step 6: Final answer
    x = 87,488.19

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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.