Home / 100,453.07-138,590.81-57,401.63

Finding the Fourth Proportional to 100,453.07, 138,590.81 and 57,401.63

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Solution

The fourth proportional to 100,453.07, 138,590.81 and 57,401.63 is: 79,194.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,453.07 : 138,590.81 = 57,401.63 : x
  2. Step 2: Convert to fraction form
    100,453.07/138,590.81 = 57,401.63/x
  3. Step 3: Cross multiply
    100,453.07x = 138,590.81 × 57,401.63
  4. Step 4: Simplify right side
    100,453.07x = 7,955,337,847.57
  5. Step 5: Solve for x
    x = 7,955,337,847.57/100,453.07
  6. Step 6: Final answer
    x = 79,194.58

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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.