Home / 100,577.98-138,782.20-58,128.32

Finding the Fourth Proportional to 100,577.98, 138,782.20 and 58,128.32

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Solution

The fourth proportional to 100,577.98, 138,782.20 and 58,128.32 is: 80,208.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,577.98 : 138,782.20 = 58,128.32 : x
  2. Step 2: Convert to fraction form
    100,577.98/138,782.20 = 58,128.32/x
  3. Step 3: Cross multiply
    100,577.98x = 138,782.20 × 58,128.32
  4. Step 4: Simplify right side
    100,577.98x = 8,067,176,131.90
  5. Step 5: Solve for x
    x = 8,067,176,131.90/100,577.98
  6. Step 6: Final answer
    x = 80,208.17

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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.