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Finding the Fourth Proportional to 79,259.60, 109,376.78 and 45,278.48

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Solution

The fourth proportional to 79,259.60, 109,376.78 and 45,278.48 is: 62,483.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,259.60 : 109,376.78 = 45,278.48 : x
  2. Step 2: Convert to fraction form
    79,259.60/109,376.78 = 45,278.48/x
  3. Step 3: Cross multiply
    79,259.60x = 109,376.78 × 45,278.48
  4. Step 4: Simplify right side
    79,259.60x = 4,952,413,572.42
  5. Step 5: Solve for x
    x = 4,952,413,572.42/79,259.60
  6. Step 6: Final answer
    x = 62,483.46

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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.