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Finding the Fourth Proportional to 255,805.90, 383,490.06 and 98,147.50

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Solution

The fourth proportional to 255,805.90, 383,490.06 and 98,147.50 is: 147,137.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,805.90 : 383,490.06 = 98,147.50 : x
  2. Step 2: Convert to fraction form
    255,805.90/383,490.06 = 98,147.50/x
  3. Step 3: Cross multiply
    255,805.90x = 383,490.06 × 98,147.50
  4. Step 4: Simplify right side
    255,805.90x = 37,638,590,663.85
  5. Step 5: Solve for x
    x = 37,638,590,663.85/255,805.90
  6. Step 6: Final answer
    x = 147,137.30

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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.