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Finding the Fourth Proportional to 111,410.64, 153,653.15 and 73,140.87

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Solution

The fourth proportional to 111,410.64, 153,653.15 and 73,140.87 is: 100,873.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,410.64 : 153,653.15 = 73,140.87 : x
  2. Step 2: Convert to fraction form
    111,410.64/153,653.15 = 73,140.87/x
  3. Step 3: Cross multiply
    111,410.64x = 153,653.15 × 73,140.87
  4. Step 4: Simplify right side
    111,410.64x = 11,238,325,828.29
  5. Step 5: Solve for x
    x = 11,238,325,828.29/111,410.64
  6. Step 6: Final answer
    x = 100,873.00

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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.