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Finding the Fourth Proportional to 239,410.50, 330,387.48 and 131,978.16

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Solution

The fourth proportional to 239,410.50, 330,387.48 and 131,978.16 is: 182,130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,410.50 : 330,387.48 = 131,978.16 : x
  2. Step 2: Convert to fraction form
    239,410.50/330,387.48 = 131,978.16/x
  3. Step 3: Cross multiply
    239,410.50x = 330,387.48 × 131,978.16
  4. Step 4: Simplify right side
    239,410.50x = 43,603,931,697.44
  5. Step 5: Solve for x
    x = 43,603,931,697.44/239,410.50
  6. Step 6: Final answer
    x = 182,130.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.