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Finding the Fourth Proportional to 289,990.65, 435,155.33 and 121,496.58

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Solution

The fourth proportional to 289,990.65, 435,155.33 and 121,496.58 is: 182,315.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,990.65 : 435,155.33 = 121,496.58 : x
  2. Step 2: Convert to fraction form
    289,990.65/435,155.33 = 121,496.58/x
  3. Step 3: Cross multiply
    289,990.65x = 435,155.33 × 121,496.58
  4. Step 4: Simplify right side
    289,990.65x = 52,869,883,756.29
  5. Step 5: Solve for x
    x = 52,869,883,756.29/289,990.65
  6. Step 6: Final answer
    x = 182,315.82

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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.