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Finding the Fourth Proportional to 129,173.49, 178,259.49 and 74,733.30

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Solution

The fourth proportional to 129,173.49, 178,259.49 and 74,733.30 is: 103,132.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,173.49 : 178,259.49 = 74,733.30 : x
  2. Step 2: Convert to fraction form
    129,173.49/178,259.49 = 74,733.30/x
  3. Step 3: Cross multiply
    129,173.49x = 178,259.49 × 74,733.30
  4. Step 4: Simplify right side
    129,173.49x = 13,321,919,944.02
  5. Step 5: Solve for x
    x = 13,321,919,944.02/129,173.49
  6. Step 6: Final answer
    x = 103,132.00

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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.