Home / 81,098.16-121,634.02-28,495.36

Finding the Fourth Proportional to 81,098.16, 121,634.02 and 28,495.36

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Solution

The fourth proportional to 81,098.16, 121,634.02 and 28,495.36 is: 42,738.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,098.16 : 121,634.02 = 28,495.36 : x
  2. Step 2: Convert to fraction form
    81,098.16/121,634.02 = 28,495.36/x
  3. Step 3: Cross multiply
    81,098.16x = 121,634.02 × 28,495.36
  4. Step 4: Simplify right side
    81,098.16x = 3,466,005,188.15
  5. Step 5: Solve for x
    x = 3,466,005,188.15/81,098.16
  6. Step 6: Final answer
    x = 42,738.40

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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.