Home / 87,974.66-121,405.16-47,688.39

Finding the Fourth Proportional to 87,974.66, 121,405.16 and 47,688.39

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Solution

The fourth proportional to 87,974.66, 121,405.16 and 47,688.39 is: 65,810.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,974.66 : 121,405.16 = 47,688.39 : x
  2. Step 2: Convert to fraction form
    87,974.66/121,405.16 = 47,688.39/x
  3. Step 3: Cross multiply
    87,974.66x = 121,405.16 × 47,688.39
  4. Step 4: Simplify right side
    87,974.66x = 5,789,616,737.31
  5. Step 5: Solve for x
    x = 5,789,616,737.31/87,974.66
  6. Step 6: Final answer
    x = 65,810.05

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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.