Home / 138,887.34-191,660.94-78,464.22

Finding the Fourth Proportional to 138,887.34, 191,660.94 and 78,464.22

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Solution

The fourth proportional to 138,887.34, 191,660.94 and 78,464.22 is: 108,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.34 : 191,660.94 = 78,464.22 : x
  2. Step 2: Convert to fraction form
    138,887.34/191,660.94 = 78,464.22/x
  3. Step 3: Cross multiply
    138,887.34x = 191,660.94 × 78,464.22
  4. Step 4: Simplify right side
    138,887.34x = 15,038,526,161.57
  5. Step 5: Solve for x
    x = 15,038,526,161.57/138,887.34
  6. Step 6: Final answer
    x = 108,278.60

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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.