Home / 211,867.81-317,799.96-85,506.12

Finding the Fourth Proportional to 211,867.81, 317,799.96 and 85,506.12

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Solution

The fourth proportional to 211,867.81, 317,799.96 and 85,506.12 is: 128,258.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,867.81 : 317,799.96 = 85,506.12 : x
  2. Step 2: Convert to fraction form
    211,867.81/317,799.96 = 85,506.12/x
  3. Step 3: Cross multiply
    211,867.81x = 317,799.96 × 85,506.12
  4. Step 4: Simplify right side
    211,867.81x = 27,173,841,515.76
  5. Step 5: Solve for x
    x = 27,173,841,515.76/211,867.81
  6. Step 6: Final answer
    x = 128,258.47

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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.