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Finding the Fourth Proportional to 100,653.59, 138,903.66 and 55,333.46

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Solution

The fourth proportional to 100,653.59, 138,903.66 and 55,333.46 is: 76,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,653.59 : 138,903.66 = 55,333.46 : x
  2. Step 2: Convert to fraction form
    100,653.59/138,903.66 = 55,333.46/x
  3. Step 3: Cross multiply
    100,653.59x = 138,903.66 × 55,333.46
  4. Step 4: Simplify right side
    100,653.59x = 7,686,019,419.95
  5. Step 5: Solve for x
    x = 7,686,019,419.95/100,653.59
  6. Step 6: Final answer
    x = 76,361.11

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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.