Home / 261,620-392,433.70-74,631.50

Finding the Fourth Proportional to 261,620, 392,433.70 and 74,631.50

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Solution

The fourth proportional to 261,620, 392,433.70 and 74,631.50 is: 111,948.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,620 : 392,433.70 = 74,631.50 : x
  2. Step 2: Convert to fraction form
    261,620/392,433.70 = 74,631.50/x
  3. Step 3: Cross multiply
    261,620x = 392,433.70 × 74,631.50
  4. Step 4: Simplify right side
    261,620x = 29,287,915,681.55
  5. Step 5: Solve for x
    x = 29,287,915,681.55/261,620
  6. Step 6: Final answer
    x = 111,948.31

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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.