Home / 289,721.40-434,322.90-112,169.40

Finding the Fourth Proportional to 289,721.40, 434,322.90 and 112,169.40

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Solution

The fourth proportional to 289,721.40, 434,322.90 and 112,169.40 is: 168,153.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,721.40 : 434,322.90 = 112,169.40 : x
  2. Step 2: Convert to fraction form
    289,721.40/434,322.90 = 112,169.40/x
  3. Step 3: Cross multiply
    289,721.40x = 434,322.90 × 112,169.40
  4. Step 4: Simplify right side
    289,721.40x = 48,717,739,099.26
  5. Step 5: Solve for x
    x = 48,717,739,099.26/289,721.40
  6. Step 6: Final answer
    x = 168,153.75

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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.