Home / 149,261.07-205,985.37-81,279.21

Finding the Fourth Proportional to 149,261.07, 205,985.37 and 81,279.21

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Solution

The fourth proportional to 149,261.07, 205,985.37 and 81,279.21 is: 112,168.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,261.07 : 205,985.37 = 81,279.21 : x
  2. Step 2: Convert to fraction form
    149,261.07/205,985.37 = 81,279.21/x
  3. Step 3: Cross multiply
    149,261.07x = 205,985.37 × 81,279.21
  4. Step 4: Simplify right side
    149,261.07x = 16,742,328,145.16
  5. Step 5: Solve for x
    x = 16,742,328,145.16/149,261.07
  6. Step 6: Final answer
    x = 112,168.08

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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.