Home / 87,739.20-121,072.32-51,929.10

Finding the Fourth Proportional to 87,739.20, 121,072.32 and 51,929.10

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Solution

The fourth proportional to 87,739.20, 121,072.32 and 51,929.10 is: 71,657.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,739.20 : 121,072.32 = 51,929.10 : x
  2. Step 2: Convert to fraction form
    87,739.20/121,072.32 = 51,929.10/x
  3. Step 3: Cross multiply
    87,739.20x = 121,072.32 × 51,929.10
  4. Step 4: Simplify right side
    87,739.20x = 6,287,176,612.51
  5. Step 5: Solve for x
    x = 6,287,176,612.51/87,739.20
  6. Step 6: Final answer
    x = 71,657.56

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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.