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Finding the Fourth Proportional to 90,209.98, 124,487.90 and 49,921.34

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Solution

The fourth proportional to 90,209.98, 124,487.90 and 49,921.34 is: 68,890.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,209.98 : 124,487.90 = 49,921.34 : x
  2. Step 2: Convert to fraction form
    90,209.98/124,487.90 = 49,921.34/x
  3. Step 3: Cross multiply
    90,209.98x = 124,487.90 × 49,921.34
  4. Step 4: Simplify right side
    90,209.98x = 6,214,602,532.18
  5. Step 5: Solve for x
    x = 6,214,602,532.18/90,209.98
  6. Step 6: Final answer
    x = 68,890.41

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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.