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Finding the Fourth Proportional to 105,425.50, 145,485.90 and 60,102.04

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Solution

The fourth proportional to 105,425.50, 145,485.90 and 60,102.04 is: 82,940.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,425.50 : 145,485.90 = 60,102.04 : x
  2. Step 2: Convert to fraction form
    105,425.50/145,485.90 = 60,102.04/x
  3. Step 3: Cross multiply
    105,425.50x = 145,485.90 × 60,102.04
  4. Step 4: Simplify right side
    105,425.50x = 8,743,999,381.24
  5. Step 5: Solve for x
    x = 8,743,999,381.24/105,425.50
  6. Step 6: Final answer
    x = 82,940.08

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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.