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Finding the Fourth Proportional to 61,401.80, 92,102.70 and 42,739.40

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Solution

The fourth proportional to 61,401.80, 92,102.70 and 42,739.40 is: 64,109.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,401.80 : 92,102.70 = 42,739.40 : x
  2. Step 2: Convert to fraction form
    61,401.80/92,102.70 = 42,739.40/x
  3. Step 3: Cross multiply
    61,401.80x = 92,102.70 × 42,739.40
  4. Step 4: Simplify right side
    61,401.80x = 3,936,414,136.38
  5. Step 5: Solve for x
    x = 3,936,414,136.38/61,401.80
  6. Step 6: Final answer
    x = 64,109.10

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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.