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Finding the Fourth Proportional to 74,643.62, 103,015.47 and 55,747.94

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Solution

The fourth proportional to 74,643.62, 103,015.47 and 55,747.94 is: 76,937.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,643.62 : 103,015.47 = 55,747.94 : x
  2. Step 2: Convert to fraction form
    74,643.62/103,015.47 = 55,747.94/x
  3. Step 3: Cross multiply
    74,643.62x = 103,015.47 × 55,747.94
  4. Step 4: Simplify right side
    74,643.62x = 5,742,900,240.63
  5. Step 5: Solve for x
    x = 5,742,900,240.63/74,643.62
  6. Step 6: Final answer
    x = 76,937.59

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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.