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Finding the Fourth Proportional to 165,482.40, 248,139.36 and 81,248.88

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Solution

The fourth proportional to 165,482.40, 248,139.36 and 81,248.88 is: 121,831.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,482.40 : 248,139.36 = 81,248.88 : x
  2. Step 2: Convert to fraction form
    165,482.40/248,139.36 = 81,248.88/x
  3. Step 3: Cross multiply
    165,482.40x = 248,139.36 × 81,248.88
  4. Step 4: Simplify right side
    165,482.40x = 20,161,045,083.92
  5. Step 5: Solve for x
    x = 20,161,045,083.92/165,482.40
  6. Step 6: Final answer
    x = 121,831.96

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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.