Home / 75,478.13-103,979.78-52,774.64

Finding the Fourth Proportional to 75,478.13, 103,979.78 and 52,774.64

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Solution

The fourth proportional to 75,478.13, 103,979.78 and 52,774.64 is: 72,703.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,478.13 : 103,979.78 = 52,774.64 : x
  2. Step 2: Convert to fraction form
    75,478.13/103,979.78 = 52,774.64/x
  3. Step 3: Cross multiply
    75,478.13x = 103,979.78 × 52,774.64
  4. Step 4: Simplify right side
    75,478.13x = 5,487,494,936.88
  5. Step 5: Solve for x
    x = 5,487,494,936.88/75,478.13
  6. Step 6: Final answer
    x = 72,703.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.