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Finding the Fourth Proportional to 110,915.88, 153,131.76 and 72,190.68

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Solution

The fourth proportional to 110,915.88, 153,131.76 and 72,190.68 is: 99,667.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,915.88 : 153,131.76 = 72,190.68 : x
  2. Step 2: Convert to fraction form
    110,915.88/153,131.76 = 72,190.68/x
  3. Step 3: Cross multiply
    110,915.88x = 153,131.76 × 72,190.68
  4. Step 4: Simplify right side
    110,915.88x = 11,054,685,884.00
  5. Step 5: Solve for x
    x = 11,054,685,884.00/110,915.88
  6. Step 6: Final answer
    x = 99,667.30

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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.