Home / 105,659.85-145,810.59-57,912.18

Finding the Fourth Proportional to 105,659.85, 145,810.59 and 57,912.18

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Solution

The fourth proportional to 105,659.85, 145,810.59 and 57,912.18 is: 79,918.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,659.85 : 145,810.59 = 57,912.18 : x
  2. Step 2: Convert to fraction form
    105,659.85/145,810.59 = 57,912.18/x
  3. Step 3: Cross multiply
    105,659.85x = 145,810.59 × 57,912.18
  4. Step 4: Simplify right side
    105,659.85x = 8,444,209,133.99
  5. Step 5: Solve for x
    x = 8,444,209,133.99/105,659.85
  6. Step 6: Final answer
    x = 79,918.81

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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.