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Finding the Fourth Proportional to 289,979.80, 435,099.30 and 103,125.40

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Solution

The fourth proportional to 289,979.80, 435,099.30 and 103,125.40 is: 154,734.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,979.80 : 435,099.30 = 103,125.40 : x
  2. Step 2: Convert to fraction form
    289,979.80/435,099.30 = 103,125.40/x
  3. Step 3: Cross multiply
    289,979.80x = 435,099.30 × 103,125.40
  4. Step 4: Simplify right side
    289,979.80x = 44,869,789,352.22
  5. Step 5: Solve for x
    x = 44,869,789,352.22/289,979.80
  6. Step 6: Final answer
    x = 154,734.19

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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.