Home / 131,129.36-180,949.20-77,411.60

Finding the Fourth Proportional to 131,129.36, 180,949.20 and 77,411.60

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Solution

The fourth proportional to 131,129.36, 180,949.20 and 77,411.60 is: 106,822.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,129.36 : 180,949.20 = 77,411.60 : x
  2. Step 2: Convert to fraction form
    131,129.36/180,949.20 = 77,411.60/x
  3. Step 3: Cross multiply
    131,129.36x = 180,949.20 × 77,411.60
  4. Step 4: Simplify right side
    131,129.36x = 14,007,567,090.72
  5. Step 5: Solve for x
    x = 14,007,567,090.72/131,129.36
  6. Step 6: Final answer
    x = 106,822.51

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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.