Home / 138,074.89-190,542.15-77,644.25

Finding the Fourth Proportional to 138,074.89, 190,542.15 and 77,644.25

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Solution

The fourth proportional to 138,074.89, 190,542.15 and 77,644.25 is: 107,148.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,074.89 : 190,542.15 = 77,644.25 : x
  2. Step 2: Convert to fraction form
    138,074.89/190,542.15 = 77,644.25/x
  3. Step 3: Cross multiply
    138,074.89x = 190,542.15 × 77,644.25
  4. Step 4: Simplify right side
    138,074.89x = 14,794,502,330.14
  5. Step 5: Solve for x
    x = 14,794,502,330.14/138,074.89
  6. Step 6: Final answer
    x = 107,148.39

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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.