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Finding the Fourth Proportional to 239,410.40, 330,387.35 and 131,978.07

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Solution

The fourth proportional to 239,410.40, 330,387.35 and 131,978.07 is: 182,130.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,410.40 : 330,387.35 = 131,978.07 : x
  2. Step 2: Convert to fraction form
    239,410.40/330,387.35 = 131,978.07/x
  3. Step 3: Cross multiply
    239,410.40x = 330,387.35 × 131,978.07
  4. Step 4: Simplify right side
    239,410.40x = 43,603,884,805.41
  5. Step 5: Solve for x
    x = 43,603,884,805.41/239,410.40
  6. Step 6: Final answer
    x = 182,130.29

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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.