Home / 138,021.82-190,448.76-77,581.24

Finding the Fourth Proportional to 138,021.82, 190,448.76 and 77,581.24

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Solution

The fourth proportional to 138,021.82, 190,448.76 and 77,581.24 is: 107,050.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,021.82 : 190,448.76 = 77,581.24 : x
  2. Step 2: Convert to fraction form
    138,021.82/190,448.76 = 77,581.24/x
  3. Step 3: Cross multiply
    138,021.82x = 190,448.76 × 77,581.24
  4. Step 4: Simplify right side
    138,021.82x = 14,775,250,957.26
  5. Step 5: Solve for x
    x = 14,775,250,957.26/138,021.82
  6. Step 6: Final answer
    x = 107,050.11

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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.