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Finding the Fourth Proportional to 68,409.76, 94,407.06 and 42,917.20

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Solution

The fourth proportional to 68,409.76, 94,407.06 and 42,917.20 is: 59,226.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,409.76 : 94,407.06 = 42,917.20 : x
  2. Step 2: Convert to fraction form
    68,409.76/94,407.06 = 42,917.20/x
  3. Step 3: Cross multiply
    68,409.76x = 94,407.06 × 42,917.20
  4. Step 4: Simplify right side
    68,409.76x = 4,051,686,675.43
  5. Step 5: Solve for x
    x = 4,051,686,675.43/68,409.76
  6. Step 6: Final answer
    x = 59,226.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.