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Finding the Fourth Proportional to 67,051.80, 100,431.90 and 40,710.60

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Solution

The fourth proportional to 67,051.80, 100,431.90 and 40,710.60 is: 60,977.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,051.80 : 100,431.90 = 40,710.60 : x
  2. Step 2: Convert to fraction form
    67,051.80/100,431.90 = 40,710.60/x
  3. Step 3: Cross multiply
    67,051.80x = 100,431.90 × 40,710.60
  4. Step 4: Simplify right side
    67,051.80x = 4,088,642,908.14
  5. Step 5: Solve for x
    x = 4,088,642,908.14/67,051.80
  6. Step 6: Final answer
    x = 60,977.38

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1.5x scale

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.