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Finding the Fourth Proportional to 158,321.57, 236,921.40 and 139,638.11

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Solution

The fourth proportional to 158,321.57, 236,921.40 and 139,638.11 is: 208,962.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,321.57 : 236,921.40 = 139,638.11 : x
  2. Step 2: Convert to fraction form
    158,321.57/236,921.40 = 139,638.11/x
  3. Step 3: Cross multiply
    158,321.57x = 236,921.40 × 139,638.11
  4. Step 4: Simplify right side
    158,321.57x = 33,083,255,329.95
  5. Step 5: Solve for x
    x = 33,083,255,329.95/158,321.57
  6. Step 6: Final answer
    x = 208,962.41

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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.