Home / 105,628.35-145,767.70-57,231.06

Finding the Fourth Proportional to 105,628.35, 145,767.70 and 57,231.06

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Solution

The fourth proportional to 105,628.35, 145,767.70 and 57,231.06 is: 78,979.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,628.35 : 145,767.70 = 57,231.06 : x
  2. Step 2: Convert to fraction form
    105,628.35/145,767.70 = 57,231.06/x
  3. Step 3: Cross multiply
    105,628.35x = 145,767.70 × 57,231.06
  4. Step 4: Simplify right side
    105,628.35x = 8,342,439,984.76
  5. Step 5: Solve for x
    x = 8,342,439,984.76/105,628.35
  6. Step 6: Final answer
    x = 78,979.18

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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.