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Finding the Third Proportional to 54,428 and 79,779

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Solution

The third proportional to 54,428 and 79,779 is: 116,937.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,428 : 79,779 = 79,779 : x
  2. Step 2: Convert to fraction form
    54,428/79,779 = 79,779/x
  3. Step 3: Cross multiply
    54,428x = 79,779 × 79,779
  4. Step 4: Simplify right side
    54,428x = 6,364,688,841
  5. Step 5: Solve for x
    x = 6,364,688,841/54,428
  6. Step 6: Final answer
    x = 116,937.77

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.