Home / 149,021.81-205,641.78-85,363.71

Finding the Fourth Proportional to 149,021.81, 205,641.78 and 85,363.71

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Solution

The fourth proportional to 149,021.81, 205,641.78 and 85,363.71 is: 117,797.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,021.81 : 205,641.78 = 85,363.71 : x
  2. Step 2: Convert to fraction form
    149,021.81/205,641.78 = 85,363.71/x
  3. Step 3: Cross multiply
    149,021.81x = 205,641.78 × 85,363.71
  4. Step 4: Simplify right side
    149,021.81x = 17,554,345,271.80
  5. Step 5: Solve for x
    x = 17,554,345,271.80/149,021.81
  6. Step 6: Final answer
    x = 117,797.16

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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.