Home / 138,554.43-191,205-74,892.23

Finding the Fourth Proportional to 138,554.43, 191,205 and 74,892.23

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Solution

The fourth proportional to 138,554.43, 191,205 and 74,892.23 is: 103,351.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,554.43 : 191,205 = 74,892.23 : x
  2. Step 2: Convert to fraction form
    138,554.43/191,205 = 74,892.23/x
  3. Step 3: Cross multiply
    138,554.43x = 191,205 × 74,892.23
  4. Step 4: Simplify right side
    138,554.43x = 14,319,768,837.15
  5. Step 5: Solve for x
    x = 14,319,768,837.15/138,554.43
  6. Step 6: Final answer
    x = 103,351.22

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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.