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Finding the Fourth Proportional to 98,731.71, 136,249.80 and 53,409.68

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Solution

The fourth proportional to 98,731.71, 136,249.80 and 53,409.68 is: 73,705.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,731.71 : 136,249.80 = 53,409.68 : x
  2. Step 2: Convert to fraction form
    98,731.71/136,249.80 = 53,409.68/x
  3. Step 3: Cross multiply
    98,731.71x = 136,249.80 × 53,409.68
  4. Step 4: Simplify right side
    98,731.71x = 7,277,057,847.47
  5. Step 5: Solve for x
    x = 7,277,057,847.47/98,731.71
  6. Step 6: Final answer
    x = 73,705.38

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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.