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Finding the Fourth Proportional to 81,063.84, 121,607.94 and 28,464.06

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Solution

The fourth proportional to 81,063.84, 121,607.94 and 28,464.06 is: 42,700.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,063.84 : 121,607.94 = 28,464.06 : x
  2. Step 2: Convert to fraction form
    81,063.84/121,607.94 = 28,464.06/x
  3. Step 3: Cross multiply
    81,063.84x = 121,607.94 × 28,464.06
  4. Step 4: Simplify right side
    81,063.84x = 3,461,455,700.64
  5. Step 5: Solve for x
    x = 3,461,455,700.64/81,063.84
  6. Step 6: Final answer
    x = 42,700.37

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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.