Home / 81,032.72-121,539.99-31,077.77

Finding the Fourth Proportional to 81,032.72, 121,539.99 and 31,077.77

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Solution

The fourth proportional to 81,032.72, 121,539.99 and 31,077.77 is: 46,613.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,032.72 : 121,539.99 = 31,077.77 : x
  2. Step 2: Convert to fraction form
    81,032.72/121,539.99 = 31,077.77/x
  3. Step 3: Cross multiply
    81,032.72x = 121,539.99 × 31,077.77
  4. Step 4: Simplify right side
    81,032.72x = 3,777,191,699.63
  5. Step 5: Solve for x
    x = 3,777,191,699.63/81,032.72
  6. Step 6: Final answer
    x = 46,613.17

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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.