Home / 81,276.45-121,889.71-28,673.63

Finding the Fourth Proportional to 81,276.45, 121,889.71 and 28,673.63

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Solution

The fourth proportional to 81,276.45, 121,889.71 and 28,673.63 is: 43,001.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,276.45 : 121,889.71 = 28,673.63 : x
  2. Step 2: Convert to fraction form
    81,276.45/121,889.71 = 28,673.63/x
  3. Step 3: Cross multiply
    81,276.45x = 121,889.71 × 28,673.63
  4. Step 4: Simplify right side
    81,276.45x = 3,495,020,328.83
  5. Step 5: Solve for x
    x = 3,495,020,328.83/81,276.45
  6. Step 6: Final answer
    x = 43,001.64

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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.