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Finding the Fourth Proportional to 98,391.90, 147,572.01 and 28,255.26

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Solution

The fourth proportional to 98,391.90, 147,572.01 and 28,255.26 is: 42,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,391.90 : 147,572.01 = 28,255.26 : x
  2. Step 2: Convert to fraction form
    98,391.90/147,572.01 = 28,255.26/x
  3. Step 3: Cross multiply
    98,391.90x = 147,572.01 × 28,255.26
  4. Step 4: Simplify right side
    98,391.90x = 4,169,685,511.27
  5. Step 5: Solve for x
    x = 4,169,685,511.27/98,391.90
  6. Step 6: Final answer
    x = 42,378.34

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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.