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Finding the Fourth Proportional to 326,710.98, 490,079.16 and 90,072.18

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Solution

The fourth proportional to 326,710.98, 490,079.16 and 90,072.18 is: 135,111.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,710.98 : 490,079.16 = 90,072.18 : x
  2. Step 2: Convert to fraction form
    326,710.98/490,079.16 = 90,072.18/x
  3. Step 3: Cross multiply
    326,710.98x = 490,079.16 × 90,072.18
  4. Step 4: Simplify right side
    326,710.98x = 44,142,498,313.77
  5. Step 5: Solve for x
    x = 44,142,498,313.77/326,710.98
  6. Step 6: Final answer
    x = 135,111.77

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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.