Home / 43,090.20-64,635.30-28,121.40

Finding the Fourth Proportional to 43,090.20, 64,635.30 and 28,121.40

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Solution

The fourth proportional to 43,090.20, 64,635.30 and 28,121.40 is: 42,182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,090.20 : 64,635.30 = 28,121.40 : x
  2. Step 2: Convert to fraction form
    43,090.20/64,635.30 = 28,121.40/x
  3. Step 3: Cross multiply
    43,090.20x = 64,635.30 × 28,121.40
  4. Step 4: Simplify right side
    43,090.20x = 1,817,635,125.42
  5. Step 5: Solve for x
    x = 1,817,635,125.42/43,090.20
  6. Step 6: Final answer
    x = 42,182.10

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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.