Home / 100,617.09-138,852.25-55,298.81

Finding the Fourth Proportional to 100,617.09, 138,852.25 and 55,298.81

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Solution

The fourth proportional to 100,617.09, 138,852.25 and 55,298.81 is: 76,312.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,617.09 : 138,852.25 = 55,298.81 : x
  2. Step 2: Convert to fraction form
    100,617.09/138,852.25 = 55,298.81/x
  3. Step 3: Cross multiply
    100,617.09x = 138,852.25 × 55,298.81
  4. Step 4: Simplify right side
    100,617.09x = 7,678,364,190.82
  5. Step 5: Solve for x
    x = 7,678,364,190.82/100,617.09
  6. Step 6: Final answer
    x = 76,312.72

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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.