Home / 100,365.36-138,464.68-57,915.69

Finding the Fourth Proportional to 100,365.36, 138,464.68 and 57,915.69

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Solution

The fourth proportional to 100,365.36, 138,464.68 and 57,915.69 is: 79,900.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,365.36 : 138,464.68 = 57,915.69 : x
  2. Step 2: Convert to fraction form
    100,365.36/138,464.68 = 57,915.69/x
  3. Step 3: Cross multiply
    100,365.36x = 138,464.68 × 57,915.69
  4. Step 4: Simplify right side
    100,365.36x = 8,019,277,482.83
  5. Step 5: Solve for x
    x = 8,019,277,482.83/100,365.36
  6. Step 6: Final answer
    x = 79,900.85

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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.