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Finding the Fourth Proportional to 90,453, 124,825.16 and 50,709

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Solution

The fourth proportional to 90,453, 124,825.16 and 50,709 is: 69,978.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,453 : 124,825.16 = 50,709 : x
  2. Step 2: Convert to fraction form
    90,453/124,825.16 = 50,709/x
  3. Step 3: Cross multiply
    90,453x = 124,825.16 × 50,709
  4. Step 4: Simplify right side
    90,453x = 6,329,759,038.44
  5. Step 5: Solve for x
    x = 6,329,759,038.44/90,453
  6. Step 6: Final answer
    x = 69,978.43

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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.