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Finding the Fourth Proportional to 90,392.26, 124,728.21 and 50,106

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Solution

The fourth proportional to 90,392.26, 124,728.21 and 50,106 is: 69,139.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,392.26 : 124,728.21 = 50,106 : x
  2. Step 2: Convert to fraction form
    90,392.26/124,728.21 = 50,106/x
  3. Step 3: Cross multiply
    90,392.26x = 124,728.21 × 50,106
  4. Step 4: Simplify right side
    90,392.26x = 6,249,631,690.26
  5. Step 5: Solve for x
    x = 6,249,631,690.26/90,392.26
  6. Step 6: Final answer
    x = 69,139.01

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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.