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Finding the Fourth Proportional to 188,780.64, 260,511.84 and 103,895.88

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Solution

The fourth proportional to 188,780.64, 260,511.84 and 103,895.88 is: 143,373.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,780.64 : 260,511.84 = 103,895.88 : x
  2. Step 2: Convert to fraction form
    188,780.64/260,511.84 = 103,895.88/x
  3. Step 3: Cross multiply
    188,780.64x = 260,511.84 × 103,895.88
  4. Step 4: Simplify right side
    188,780.64x = 27,066,106,867.22
  5. Step 5: Solve for x
    x = 27,066,106,867.22/188,780.64
  6. Step 6: Final answer
    x = 143,373.32

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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.