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Finding the Fourth Proportional to 103,511.75, 154,499.70 and 89,219.03

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Solution

The fourth proportional to 103,511.75, 154,499.70 and 89,219.03 is: 133,166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,511.75 : 154,499.70 = 89,219.03 : x
  2. Step 2: Convert to fraction form
    103,511.75/154,499.70 = 89,219.03/x
  3. Step 3: Cross multiply
    103,511.75x = 154,499.70 × 89,219.03
  4. Step 4: Simplify right side
    103,511.75x = 13,784,312,596.79
  5. Step 5: Solve for x
    x = 13,784,312,596.79/103,511.75
  6. Step 6: Final answer
    x = 133,166.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.