Home / 211,485.51-317,005.50-85,215.42

Finding the Fourth Proportional to 211,485.51, 317,005.50 and 85,215.42

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Solution

The fourth proportional to 211,485.51, 317,005.50 and 85,215.42 is: 127,733.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,485.51 : 317,005.50 = 85,215.42 : x
  2. Step 2: Convert to fraction form
    211,485.51/317,005.50 = 85,215.42/x
  3. Step 3: Cross multiply
    211,485.51x = 317,005.50 × 85,215.42
  4. Step 4: Simplify right side
    211,485.51x = 27,013,756,824.81
  5. Step 5: Solve for x
    x = 27,013,756,824.81/211,485.51
  6. Step 6: Final answer
    x = 127,733.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.