Home / 211,802.90-317,633.81-85,410.50

Finding the Fourth Proportional to 211,802.90, 317,633.81 and 85,410.50

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Solution

The fourth proportional to 211,802.90, 317,633.81 and 85,410.50 is: 128,087.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,802.90 : 317,633.81 = 85,410.50 : x
  2. Step 2: Convert to fraction form
    211,802.90/317,633.81 = 85,410.50/x
  3. Step 3: Cross multiply
    211,802.90x = 317,633.81 × 85,410.50
  4. Step 4: Simplify right side
    211,802.90x = 27,129,260,513.78
  5. Step 5: Solve for x
    x = 27,129,260,513.78/211,802.90
  6. Step 6: Final answer
    x = 128,087.30

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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.