Home / 105,679.06-145,852.02-65,405.80

Finding the Fourth Proportional to 105,679.06, 145,852.02 and 65,405.80

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Solution

The fourth proportional to 105,679.06, 145,852.02 and 65,405.80 is: 90,269.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,679.06 : 145,852.02 = 65,405.80 : x
  2. Step 2: Convert to fraction form
    105,679.06/145,852.02 = 65,405.80/x
  3. Step 3: Cross multiply
    105,679.06x = 145,852.02 × 65,405.80
  4. Step 4: Simplify right side
    105,679.06x = 9,539,568,049.72
  5. Step 5: Solve for x
    x = 9,539,568,049.72/105,679.06
  6. Step 6: Final answer
    x = 90,269.24

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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.