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Finding the Fourth Proportional to 68,490.20, 102,908.10 and 43,542.20

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Solution

The fourth proportional to 68,490.20, 102,908.10 and 43,542.20 is: 65,423.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,490.20 : 102,908.10 = 43,542.20 : x
  2. Step 2: Convert to fraction form
    68,490.20/102,908.10 = 43,542.20/x
  3. Step 3: Cross multiply
    68,490.20x = 102,908.10 × 43,542.20
  4. Step 4: Simplify right side
    68,490.20x = 4,480,845,071.82
  5. Step 5: Solve for x
    x = 4,480,845,071.82/68,490.20
  6. Step 6: Final answer
    x = 65,423.16

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1.5x scale

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.