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Finding the Fourth Proportional to 289,939.79, 435,020.40 and 112,571.36

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Solution

The fourth proportional to 289,939.79, 435,020.40 and 112,571.36 is: 168,900.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,939.79 : 435,020.40 = 112,571.36 : x
  2. Step 2: Convert to fraction form
    289,939.79/435,020.40 = 112,571.36/x
  3. Step 3: Cross multiply
    289,939.79x = 435,020.40 × 112,571.36
  4. Step 4: Simplify right side
    289,939.79x = 48,970,838,055.74
  5. Step 5: Solve for x
    x = 48,970,838,055.74/289,939.79
  6. Step 6: Final answer
    x = 168,900.03

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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.