Home / 138,783.54-191,520.86-75,121.16

Finding the Fourth Proportional to 138,783.54, 191,520.86 and 75,121.16

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Solution

The fourth proportional to 138,783.54, 191,520.86 and 75,121.16 is: 103,666.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,783.54 : 191,520.86 = 75,121.16 : x
  2. Step 2: Convert to fraction form
    138,783.54/191,520.86 = 75,121.16/x
  3. Step 3: Cross multiply
    138,783.54x = 191,520.86 × 75,121.16
  4. Step 4: Simplify right side
    138,783.54x = 14,387,269,167.40
  5. Step 5: Solve for x
    x = 14,387,269,167.40/138,783.54
  6. Step 6: Final answer
    x = 103,666.97

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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.