Home / 138,358.85-190,945.17-77,109.20

Finding the Fourth Proportional to 138,358.85, 190,945.17 and 77,109.20

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Solution

The fourth proportional to 138,358.85, 190,945.17 and 77,109.20 is: 106,416.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,358.85 : 190,945.17 = 77,109.20 : x
  2. Step 2: Convert to fraction form
    138,358.85/190,945.17 = 77,109.20/x
  3. Step 3: Cross multiply
    138,358.85x = 190,945.17 × 77,109.20
  4. Step 4: Simplify right side
    138,358.85x = 14,723,627,962.29
  5. Step 5: Solve for x
    x = 14,723,627,962.29/138,358.85
  6. Step 6: Final answer
    x = 106,416.24

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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.