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Finding the Fourth Proportional to 148,621.80, 205,114.98 and 89,005.80

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Solution

The fourth proportional to 148,621.80, 205,114.98 and 89,005.80 is: 122,838.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,621.80 : 205,114.98 = 89,005.80 : x
  2. Step 2: Convert to fraction form
    148,621.80/205,114.98 = 89,005.80/x
  3. Step 3: Cross multiply
    148,621.80x = 205,114.98 × 89,005.80
  4. Step 4: Simplify right side
    148,621.80x = 18,256,422,886.88
  5. Step 5: Solve for x
    x = 18,256,422,886.88/148,621.80
  6. Step 6: Final answer
    x = 122,838.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.