Home / 100,205.09-138,283.16-54,264.81

Finding the Fourth Proportional to 100,205.09, 138,283.16 and 54,264.81

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Solution

The fourth proportional to 100,205.09, 138,283.16 and 54,264.81 is: 74,885.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,205.09 : 138,283.16 = 54,264.81 : x
  2. Step 2: Convert to fraction form
    100,205.09/138,283.16 = 54,264.81/x
  3. Step 3: Cross multiply
    100,205.09x = 138,283.16 × 54,264.81
  4. Step 4: Simplify right side
    100,205.09x = 7,503,909,403.60
  5. Step 5: Solve for x
    x = 7,503,909,403.60/100,205.09
  6. Step 6: Final answer
    x = 74,885.51

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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.