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Finding the Fourth Proportional to 42,690.54, 64,080.90 and 23,986.56

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Solution

The fourth proportional to 42,690.54, 64,080.90 and 23,986.56 is: 36,005.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,690.54 : 64,080.90 = 23,986.56 : x
  2. Step 2: Convert to fraction form
    42,690.54/64,080.90 = 23,986.56/x
  3. Step 3: Cross multiply
    42,690.54x = 64,080.90 × 23,986.56
  4. Step 4: Simplify right side
    42,690.54x = 1,537,080,352.70
  5. Step 5: Solve for x
    x = 1,537,080,352.70/42,690.54
  6. Step 6: Final answer
    x = 36,005.17

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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.