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Finding the Fourth Proportional to 238,744.31, 358,040.45 and 78,790.47

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Solution

The fourth proportional to 238,744.31, 358,040.45 and 78,790.47 is: 118,160.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,744.31 : 358,040.45 = 78,790.47 : x
  2. Step 2: Convert to fraction form
    238,744.31/358,040.45 = 78,790.47/x
  3. Step 3: Cross multiply
    238,744.31x = 358,040.45 × 78,790.47
  4. Step 4: Simplify right side
    238,744.31x = 28,210,176,202.81
  5. Step 5: Solve for x
    x = 28,210,176,202.81/238,744.31
  6. Step 6: Final answer
    x = 118,160.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.