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Finding the Fourth Proportional to 79,311.90, 109,459.57 and 47,480.78

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Solution

The fourth proportional to 79,311.90, 109,459.57 and 47,480.78 is: 65,528.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,311.90 : 109,459.57 = 47,480.78 : x
  2. Step 2: Convert to fraction form
    79,311.90/109,459.57 = 47,480.78/x
  3. Step 3: Cross multiply
    79,311.90x = 109,459.57 × 47,480.78
  4. Step 4: Simplify right side
    79,311.90x = 5,197,225,762.06
  5. Step 5: Solve for x
    x = 5,197,225,762.06/79,311.90
  6. Step 6: Final answer
    x = 65,528.95

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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.