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Finding the Fourth Proportional to 238,794.45, 358,115.43 and 78,840.72

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Solution

The fourth proportional to 238,794.45, 358,115.43 and 78,840.72 is: 118,235.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,794.45 : 358,115.43 = 78,840.72 : x
  2. Step 2: Convert to fraction form
    238,794.45/358,115.43 = 78,840.72/x
  3. Step 3: Cross multiply
    238,794.45x = 358,115.43 × 78,840.72
  4. Step 4: Simplify right side
    238,794.45x = 28,234,078,344.31
  5. Step 5: Solve for x
    x = 28,234,078,344.31/238,794.45
  6. Step 6: Final answer
    x = 118,235.91

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1.5x scale

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.