Home / 81,042.59-121,480.74-31,109.24

Finding the Fourth Proportional to 81,042.59, 121,480.74 and 31,109.24

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Solution

The fourth proportional to 81,042.59, 121,480.74 and 31,109.24 is: 46,631.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,042.59 : 121,480.74 = 31,109.24 : x
  2. Step 2: Convert to fraction form
    81,042.59/121,480.74 = 31,109.24/x
  3. Step 3: Cross multiply
    81,042.59x = 121,480.74 × 31,109.24
  4. Step 4: Simplify right side
    81,042.59x = 3,779,173,203.91
  5. Step 5: Solve for x
    x = 3,779,173,203.91/81,042.59
  6. Step 6: Final answer
    x = 46,631.94

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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.