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Finding the Fourth Proportional to 130,396.32, 179,934.48 and 103,603.68

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Solution

The fourth proportional to 130,396.32, 179,934.48 and 103,603.68 is: 142,963.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,396.32 : 179,934.48 = 103,603.68 : x
  2. Step 2: Convert to fraction form
    130,396.32/179,934.48 = 103,603.68/x
  3. Step 3: Cross multiply
    130,396.32x = 179,934.48 × 103,603.68
  4. Step 4: Simplify right side
    130,396.32x = 18,641,874,286.89
  5. Step 5: Solve for x
    x = 18,641,874,286.89/130,396.32
  6. Step 6: Final answer
    x = 142,963.19

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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.