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Finding the Fourth Proportional to 154,903.50, 213,769.17 and 90,370.98

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Solution

The fourth proportional to 154,903.50, 213,769.17 and 90,370.98 is: 124,713.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,903.50 : 213,769.17 = 90,370.98 : x
  2. Step 2: Convert to fraction form
    154,903.50/213,769.17 = 90,370.98/x
  3. Step 3: Cross multiply
    154,903.50x = 213,769.17 × 90,370.98
  4. Step 4: Simplify right side
    154,903.50x = 19,318,529,386.69
  5. Step 5: Solve for x
    x = 19,318,529,386.69/154,903.50
  6. Step 6: Final answer
    x = 124,713.32

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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.