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Finding the Fourth Proportional to 261,428.50, 360,771.65 and 142,196.50

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Solution

The fourth proportional to 261,428.50, 360,771.65 and 142,196.50 is: 196,231.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,428.50 : 360,771.65 = 142,196.50 : x
  2. Step 2: Convert to fraction form
    261,428.50/360,771.65 = 142,196.50/x
  3. Step 3: Cross multiply
    261,428.50x = 360,771.65 × 142,196.50
  4. Step 4: Simplify right side
    261,428.50x = 51,300,465,929.23
  5. Step 5: Solve for x
    x = 51,300,465,929.23/261,428.50
  6. Step 6: Final answer
    x = 196,231.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.