Home / 123,180.21-170,015.09-77,829.39

Finding the Fourth Proportional to 123,180.21, 170,015.09 and 77,829.39

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Solution

The fourth proportional to 123,180.21, 170,015.09 and 77,829.39 is: 107,421.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,180.21 : 170,015.09 = 77,829.39 : x
  2. Step 2: Convert to fraction form
    123,180.21/170,015.09 = 77,829.39/x
  3. Step 3: Cross multiply
    123,180.21x = 170,015.09 × 77,829.39
  4. Step 4: Simplify right side
    123,180.21x = 13,232,170,356.35
  5. Step 5: Solve for x
    x = 13,232,170,356.35/123,180.21
  6. Step 6: Final answer
    x = 107,421.24

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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.