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Finding the Fourth Proportional to 79,220, 109,323.60 and 47,390.24

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Solution

The fourth proportional to 79,220, 109,323.60 and 47,390.24 is: 65,398.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,220 : 109,323.60 = 47,390.24 : x
  2. Step 2: Convert to fraction form
    79,220/109,323.60 = 47,390.24/x
  3. Step 3: Cross multiply
    79,220x = 109,323.60 × 47,390.24
  4. Step 4: Simplify right side
    79,220x = 5,180,871,641.66
  5. Step 5: Solve for x
    x = 5,180,871,641.66/79,220
  6. Step 6: Final answer
    x = 65,398.53

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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.