Home / 81,027.84-121,553.91-28,428.06

Finding the Fourth Proportional to 81,027.84, 121,553.91 and 28,428.06

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Solution

The fourth proportional to 81,027.84, 121,553.91 and 28,428.06 is: 42,646.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,027.84 : 121,553.91 = 28,428.06 : x
  2. Step 2: Convert to fraction form
    81,027.84/121,553.91 = 28,428.06/x
  3. Step 3: Cross multiply
    81,027.84x = 121,553.91 × 28,428.06
  4. Step 4: Simplify right side
    81,027.84x = 3,455,541,846.71
  5. Step 5: Solve for x
    x = 3,455,541,846.71/81,027.84
  6. Step 6: Final answer
    x = 42,646.35

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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.