Home / 105,649.85-145,797.93-57,902.15

Finding the Fourth Proportional to 105,649.85, 145,797.93 and 57,902.15

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Solution

The fourth proportional to 105,649.85, 145,797.93 and 57,902.15 is: 79,905.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,649.85 : 145,797.93 = 57,902.15 : x
  2. Step 2: Convert to fraction form
    105,649.85/145,797.93 = 57,902.15/x
  3. Step 3: Cross multiply
    105,649.85x = 145,797.93 × 57,902.15
  4. Step 4: Simplify right side
    105,649.85x = 8,442,012,883.56
  5. Step 5: Solve for x
    x = 8,442,012,883.56/105,649.85
  6. Step 6: Final answer
    x = 79,905.59

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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.