Home / 105,680.06-145,853.40-65,406.80

Finding the Fourth Proportional to 105,680.06, 145,853.40 and 65,406.80

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Solution

The fourth proportional to 105,680.06, 145,853.40 and 65,406.80 is: 90,270.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,680.06 : 145,853.40 = 65,406.80 : x
  2. Step 2: Convert to fraction form
    105,680.06/145,853.40 = 65,406.80/x
  3. Step 3: Cross multiply
    105,680.06x = 145,853.40 × 65,406.80
  4. Step 4: Simplify right side
    105,680.06x = 9,539,804,163.12
  5. Step 5: Solve for x
    x = 9,539,804,163.12/105,680.06
  6. Step 6: Final answer
    x = 90,270.62

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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.