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Finding the Fourth Proportional to 90,420.59, 124,786.70 and 50,138.07

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Solution

The fourth proportional to 90,420.59, 124,786.70 and 50,138.07 is: 69,194.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,420.59 : 124,786.70 = 50,138.07 : x
  2. Step 2: Convert to fraction form
    90,420.59/124,786.70 = 50,138.07/x
  3. Step 3: Cross multiply
    90,420.59x = 124,786.70 × 50,138.07
  4. Step 4: Simplify right side
    90,420.59x = 6,256,564,048.98
  5. Step 5: Solve for x
    x = 6,256,564,048.98/90,420.59
  6. Step 6: Final answer
    x = 69,194.02

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1.5x scale

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.