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Finding the Fourth Proportional to 79,121.70, 109,169.60 and 46,840.10

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Solution

The fourth proportional to 79,121.70, 109,169.60 and 46,840.10 is: 64,628.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.70 : 109,169.60 = 46,840.10 : x
  2. Step 2: Convert to fraction form
    79,121.70/109,169.60 = 46,840.10/x
  3. Step 3: Cross multiply
    79,121.70x = 109,169.60 × 46,840.10
  4. Step 4: Simplify right side
    79,121.70x = 5,113,514,200.91
  5. Step 5: Solve for x
    x = 5,113,514,200.91/79,121.70
  6. Step 6: Final answer
    x = 64,628.47

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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.