Home / 77,989.61-116,979.79-21,828.47

Finding the Fourth Proportional to 77,989.61, 116,979.79 and 21,828.47

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Solution

The fourth proportional to 77,989.61, 116,979.79 and 21,828.47 is: 32,741.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,989.61 : 116,979.79 = 21,828.47 : x
  2. Step 2: Convert to fraction form
    77,989.61/116,979.79 = 21,828.47/x
  3. Step 3: Cross multiply
    77,989.61x = 116,979.79 × 21,828.47
  4. Step 4: Simplify right side
    77,989.61x = 2,553,489,142.58
  5. Step 5: Solve for x
    x = 2,553,489,142.58/77,989.61
  6. Step 6: Final answer
    x = 32,741.40

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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.