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Finding the Fourth Proportional to 240,357.76, 331,656.86 and 138,363.51

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Solution

The fourth proportional to 240,357.76, 331,656.86 and 138,363.51 is: 190,920.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,357.76 : 331,656.86 = 138,363.51 : x
  2. Step 2: Convert to fraction form
    240,357.76/331,656.86 = 138,363.51/x
  3. Step 3: Cross multiply
    240,357.76x = 331,656.86 × 138,363.51
  4. Step 4: Simplify right side
    240,357.76x = 45,889,206,573.36
  5. Step 5: Solve for x
    x = 45,889,206,573.36/240,357.76
  6. Step 6: Final answer
    x = 190,920.43

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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.