Home / 138,748.43-191,426.09-90,328.25

Finding the Fourth Proportional to 138,748.43, 191,426.09 and 90,328.25

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Solution

The fourth proportional to 138,748.43, 191,426.09 and 90,328.25 is: 124,622.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,748.43 : 191,426.09 = 90,328.25 : x
  2. Step 2: Convert to fraction form
    138,748.43/191,426.09 = 90,328.25/x
  3. Step 3: Cross multiply
    138,748.43x = 191,426.09 × 90,328.25
  4. Step 4: Simplify right side
    138,748.43x = 17,291,182,305.27
  5. Step 5: Solve for x
    x = 17,291,182,305.27/138,748.43
  6. Step 6: Final answer
    x = 124,622.55

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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.