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Finding the Fourth Proportional to 90,203.84, 124,478.76 and 49,919.28

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Solution

The fourth proportional to 90,203.84, 124,478.76 and 49,919.28 is: 68,887.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,203.84 : 124,478.76 = 49,919.28 : x
  2. Step 2: Convert to fraction form
    90,203.84/124,478.76 = 49,919.28/x
  3. Step 3: Cross multiply
    90,203.84x = 124,478.76 × 49,919.28
  4. Step 4: Simplify right side
    90,203.84x = 6,213,890,074.49
  5. Step 5: Solve for x
    x = 6,213,890,074.49/90,203.84
  6. Step 6: Final answer
    x = 68,887.20

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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.