Home / 138,661.64-191,353.07-74,999.43

Finding the Fourth Proportional to 138,661.64, 191,353.07 and 74,999.43

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Solution

The fourth proportional to 138,661.64, 191,353.07 and 74,999.43 is: 103,499.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,661.64 : 191,353.07 = 74,999.43 : x
  2. Step 2: Convert to fraction form
    138,661.64/191,353.07 = 74,999.43/x
  3. Step 3: Cross multiply
    138,661.64x = 191,353.07 × 74,999.43
  4. Step 4: Simplify right side
    138,661.64x = 14,351,371,178.75
  5. Step 5: Solve for x
    x = 14,351,371,178.75/138,661.64
  6. Step 6: Final answer
    x = 103,499.22

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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.