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Finding the Fourth Proportional to 239,713.48, 330,803.22 and 139,109.32

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Solution

The fourth proportional to 239,713.48, 330,803.22 and 139,109.32 is: 191,970.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,713.48 : 330,803.22 = 139,109.32 : x
  2. Step 2: Convert to fraction form
    239,713.48/330,803.22 = 139,109.32/x
  3. Step 3: Cross multiply
    239,713.48x = 330,803.22 × 139,109.32
  4. Step 4: Simplify right side
    239,713.48x = 46,017,810,988.01
  5. Step 5: Solve for x
    x = 46,017,810,988.01/239,713.48
  6. Step 6: Final answer
    x = 191,970.06

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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.