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Finding the Fourth Proportional to 79,253.55, 109,366.86 and 47,420.55

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Solution

The fourth proportional to 79,253.55, 109,366.86 and 47,420.55 is: 65,438.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,253.55 : 109,366.86 = 47,420.55 : x
  2. Step 2: Convert to fraction form
    79,253.55/109,366.86 = 47,420.55/x
  3. Step 3: Cross multiply
    79,253.55x = 109,366.86 × 47,420.55
  4. Step 4: Simplify right side
    79,253.55x = 5,186,236,652.97
  5. Step 5: Solve for x
    x = 5,186,236,652.97/79,253.55
  6. Step 6: Final answer
    x = 65,438.54

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1.5x scale

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.