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Finding the Fourth Proportional to 239,705.90, 330,810.32 and 137,764.70

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Solution

The fourth proportional to 239,705.90, 330,810.32 and 137,764.70 is: 190,124.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,705.90 : 330,810.32 = 137,764.70 : x
  2. Step 2: Convert to fraction form
    239,705.90/330,810.32 = 137,764.70/x
  3. Step 3: Cross multiply
    239,705.90x = 330,810.32 × 137,764.70
  4. Step 4: Simplify right side
    239,705.90x = 45,573,983,802.88
  5. Step 5: Solve for x
    x = 45,573,983,802.88/239,705.90
  6. Step 6: Final answer
    x = 190,124.58

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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.