Home / 138,144.58-190,639.22-77,715.26

Finding the Fourth Proportional to 138,144.58, 190,639.22 and 77,715.26

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Solution

The fourth proportional to 138,144.58, 190,639.22 and 77,715.26 is: 107,246.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,144.58 : 190,639.22 = 77,715.26 : x
  2. Step 2: Convert to fraction form
    138,144.58/190,639.22 = 77,715.26/x
  3. Step 3: Cross multiply
    138,144.58x = 190,639.22 × 77,715.26
  4. Step 4: Simplify right side
    138,144.58x = 14,815,576,548.50
  5. Step 5: Solve for x
    x = 14,815,576,548.50/138,144.58
  6. Step 6: Final answer
    x = 107,246.89

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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.