Home / 81,246-121,867.92-21,274.32

Finding the Fourth Proportional to 81,246, 121,867.92 and 21,274.32

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Solution

The fourth proportional to 81,246, 121,867.92 and 21,274.32 is: 31,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,246 : 121,867.92 = 21,274.32 : x
  2. Step 2: Convert to fraction form
    81,246/121,867.92 = 21,274.32/x
  3. Step 3: Cross multiply
    81,246x = 121,867.92 × 21,274.32
  4. Step 4: Simplify right side
    81,246x = 2,592,657,127.81
  5. Step 5: Solve for x
    x = 2,592,657,127.81/81,246
  6. Step 6: Final answer
    x = 31,911.20

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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.