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Finding the Fourth Proportional to 79,374.53, 109,538.93 and 45,388.55

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Solution

The fourth proportional to 79,374.53, 109,538.93 and 45,388.55 is: 62,637.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,374.53 : 109,538.93 = 45,388.55 : x
  2. Step 2: Convert to fraction form
    79,374.53/109,538.93 = 45,388.55/x
  3. Step 3: Cross multiply
    79,374.53x = 109,538.93 × 45,388.55
  4. Step 4: Simplify right side
    79,374.53x = 4,971,813,588.57
  5. Step 5: Solve for x
    x = 4,971,813,588.57/79,374.53
  6. Step 6: Final answer
    x = 62,637.39

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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.