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Finding the Fourth Proportional to 70,630.16, 105,989.88 and 39,485.84

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Solution

The fourth proportional to 70,630.16, 105,989.88 and 39,485.84 is: 59,253.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,630.16 : 105,989.88 = 39,485.84 : x
  2. Step 2: Convert to fraction form
    70,630.16/105,989.88 = 39,485.84/x
  3. Step 3: Cross multiply
    70,630.16x = 105,989.88 × 39,485.84
  4. Step 4: Simplify right side
    70,630.16x = 4,185,099,443.30
  5. Step 5: Solve for x
    x = 4,185,099,443.30/70,630.16
  6. Step 6: Final answer
    x = 59,253.72

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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.