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Finding the Fourth Proportional to 65,620.94, 90,525.40 and 42,949.95

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Solution

The fourth proportional to 65,620.94, 90,525.40 and 42,949.95 is: 59,250.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.94 : 90,525.40 = 42,949.95 : x
  2. Step 2: Convert to fraction form
    65,620.94/90,525.40 = 42,949.95/x
  3. Step 3: Cross multiply
    65,620.94x = 90,525.40 × 42,949.95
  4. Step 4: Simplify right side
    65,620.94x = 3,888,060,956.88
  5. Step 5: Solve for x
    x = 3,888,060,956.88/65,620.94
  6. Step 6: Final answer
    x = 59,250.31

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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.