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Finding the Fourth Proportional to 68,705.61, 94,859.97 and 42,903.46

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Solution

The fourth proportional to 68,705.61, 94,859.97 and 42,903.46 is: 59,235.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,705.61 : 94,859.97 = 42,903.46 : x
  2. Step 2: Convert to fraction form
    68,705.61/94,859.97 = 42,903.46/x
  3. Step 3: Cross multiply
    68,705.61x = 94,859.97 × 42,903.46
  4. Step 4: Simplify right side
    68,705.61x = 4,069,820,928.50
  5. Step 5: Solve for x
    x = 4,069,820,928.50/68,705.61
  6. Step 6: Final answer
    x = 59,235.64

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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.