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Finding the Fourth Proportional to 102,660.80, 154,048.80 and 43,486.40

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Solution

The fourth proportional to 102,660.80, 154,048.80 and 43,486.40 is: 65,254.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,660.80 : 154,048.80 = 43,486.40 : x
  2. Step 2: Convert to fraction form
    102,660.80/154,048.80 = 43,486.40/x
  3. Step 3: Cross multiply
    102,660.80x = 154,048.80 × 43,486.40
  4. Step 4: Simplify right side
    102,660.80x = 6,699,027,736.32
  5. Step 5: Solve for x
    x = 6,699,027,736.32/102,660.80
  6. Step 6: Final answer
    x = 65,254.00

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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.