Home / 100,353.42-138,486.58-57,911.04

Finding the Fourth Proportional to 100,353.42, 138,486.58 and 57,911.04

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Solution

The fourth proportional to 100,353.42, 138,486.58 and 57,911.04 is: 79,916.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,353.42 : 138,486.58 = 57,911.04 : x
  2. Step 2: Convert to fraction form
    100,353.42/138,486.58 = 57,911.04/x
  3. Step 3: Cross multiply
    100,353.42x = 138,486.58 × 57,911.04
  4. Step 4: Simplify right side
    100,353.42x = 8,019,901,729.07
  5. Step 5: Solve for x
    x = 8,019,901,729.07/100,353.42
  6. Step 6: Final answer
    x = 79,916.58

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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.