Home / 81,400.16-121,881.48-51,656.96

Finding the Fourth Proportional to 81,400.16, 121,881.48 and 51,656.96

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Solution

The fourth proportional to 81,400.16, 121,881.48 and 51,656.96 is: 77,346.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,400.16 : 121,881.48 = 51,656.96 : x
  2. Step 2: Convert to fraction form
    81,400.16/121,881.48 = 51,656.96/x
  3. Step 3: Cross multiply
    81,400.16x = 121,881.48 × 51,656.96
  4. Step 4: Simplify right side
    81,400.16x = 6,296,026,737.10
  5. Step 5: Solve for x
    x = 6,296,026,737.10/81,400.16
  6. Step 6: Final answer
    x = 77,346.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.