Home / 79,621.07-109,840.34-51,335.87

Finding the Fourth Proportional to 79,621.07, 109,840.34 and 51,335.87

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Solution

The fourth proportional to 79,621.07, 109,840.34 and 51,335.87 is: 70,819.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,621.07 : 109,840.34 = 51,335.87 : x
  2. Step 2: Convert to fraction form
    79,621.07/109,840.34 = 51,335.87/x
  3. Step 3: Cross multiply
    79,621.07x = 109,840.34 × 51,335.87
  4. Step 4: Simplify right side
    79,621.07x = 5,638,749,158.32
  5. Step 5: Solve for x
    x = 5,638,749,158.32/79,621.07
  6. Step 6: Final answer
    x = 70,819.81

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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.