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Finding the Fourth Proportional to 303,780.63, 455,541.06 and 104,121.20

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Solution

The fourth proportional to 303,780.63, 455,541.06 and 104,121.20 is: 156,137.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,780.63 : 455,541.06 = 104,121.20 : x
  2. Step 2: Convert to fraction form
    303,780.63/455,541.06 = 104,121.20/x
  3. Step 3: Cross multiply
    303,780.63x = 455,541.06 × 104,121.20
  4. Step 4: Simplify right side
    303,780.63x = 47,431,480,783.36
  5. Step 5: Solve for x
    x = 47,431,480,783.36/303,780.63
  6. Step 6: Final answer
    x = 156,137.28

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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.