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Finding the Fourth Proportional to 90,219.89, 124,492.52 and 51,991.96

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Solution

The fourth proportional to 90,219.89, 124,492.52 and 51,991.96 is: 71,742.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,219.89 : 124,492.52 = 51,991.96 : x
  2. Step 2: Convert to fraction form
    90,219.89/124,492.52 = 51,991.96/x
  3. Step 3: Cross multiply
    90,219.89x = 124,492.52 × 51,991.96
  4. Step 4: Simplify right side
    90,219.89x = 6,472,609,548.95
  5. Step 5: Solve for x
    x = 6,472,609,548.95/90,219.89
  6. Step 6: Final answer
    x = 71,742.60

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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.