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Finding the Fourth Proportional to 142,453.89, 213,620.09 and 42,612.48

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Solution

The fourth proportional to 142,453.89, 213,620.09 and 42,612.48 is: 63,900.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,453.89 : 213,620.09 = 42,612.48 : x
  2. Step 2: Convert to fraction form
    142,453.89/213,620.09 = 42,612.48/x
  3. Step 3: Cross multiply
    142,453.89x = 213,620.09 × 42,612.48
  4. Step 4: Simplify right side
    142,453.89x = 9,102,881,599.66
  5. Step 5: Solve for x
    x = 9,102,881,599.66/142,453.89
  6. Step 6: Final answer
    x = 63,900.55

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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.