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Finding the Fourth Proportional to 111,003.45, 153,082.53 and 72,749.07

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Solution

The fourth proportional to 111,003.45, 153,082.53 and 72,749.07 is: 100,326.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,003.45 : 153,082.53 = 72,749.07 : x
  2. Step 2: Convert to fraction form
    111,003.45/153,082.53 = 72,749.07/x
  3. Step 3: Cross multiply
    111,003.45x = 153,082.53 × 72,749.07
  4. Step 4: Simplify right side
    111,003.45x = 11,136,611,690.75
  5. Step 5: Solve for x
    x = 11,136,611,690.75/111,003.45
  6. Step 6: Final answer
    x = 100,326.72

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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.