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Finding the Fourth Proportional to 42,744.60, 64,116.90 and 28,747.80

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Solution

The fourth proportional to 42,744.60, 64,116.90 and 28,747.80 is: 43,121.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,744.60 : 64,116.90 = 28,747.80 : x
  2. Step 2: Convert to fraction form
    42,744.60/64,116.90 = 28,747.80/x
  3. Step 3: Cross multiply
    42,744.60x = 64,116.90 × 28,747.80
  4. Step 4: Simplify right side
    42,744.60x = 1,843,219,817.82
  5. Step 5: Solve for x
    x = 1,843,219,817.82/42,744.60
  6. Step 6: Final answer
    x = 43,121.70

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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.