Home / 280,981.78-421,476.64-91,443.14

Finding the Fourth Proportional to 280,981.78, 421,476.64 and 91,443.14

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Solution

The fourth proportional to 280,981.78, 421,476.64 and 91,443.14 is: 137,166.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,981.78 : 421,476.64 = 91,443.14 : x
  2. Step 2: Convert to fraction form
    280,981.78/421,476.64 = 91,443.14/x
  3. Step 3: Cross multiply
    280,981.78x = 421,476.64 × 91,443.14
  4. Step 4: Simplify right side
    280,981.78x = 38,541,147,398.25
  5. Step 5: Solve for x
    x = 38,541,147,398.25/280,981.78
  6. Step 6: Final answer
    x = 137,166.00

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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.