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Finding the Fourth Proportional to 98,449.64, 135,855.78 and 56,004.20

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Solution

The fourth proportional to 98,449.64, 135,855.78 and 56,004.20 is: 77,283.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,449.64 : 135,855.78 = 56,004.20 : x
  2. Step 2: Convert to fraction form
    98,449.64/135,855.78 = 56,004.20/x
  3. Step 3: Cross multiply
    98,449.64x = 135,855.78 × 56,004.20
  4. Step 4: Simplify right side
    98,449.64x = 7,608,494,274.28
  5. Step 5: Solve for x
    x = 7,608,494,274.28/98,449.64
  6. Step 6: Final answer
    x = 77,283.11

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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.