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Finding the Fourth Proportional to 98,127.72, 135,420.42 and 55,690.20

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Solution

The fourth proportional to 98,127.72, 135,420.42 and 55,690.20 is: 76,854.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,127.72 : 135,420.42 = 55,690.20 : x
  2. Step 2: Convert to fraction form
    98,127.72/135,420.42 = 55,690.20/x
  3. Step 3: Cross multiply
    98,127.72x = 135,420.42 × 55,690.20
  4. Step 4: Simplify right side
    98,127.72x = 7,541,590,273.88
  5. Step 5: Solve for x
    x = 7,541,590,273.88/98,127.72
  6. Step 6: Final answer
    x = 76,854.84

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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.