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Finding the Fourth Proportional to 211,903.76, 317,820.69 and 69,750.89

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Solution

The fourth proportional to 211,903.76, 317,820.69 and 69,750.89 is: 104,614.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,903.76 : 317,820.69 = 69,750.89 : x
  2. Step 2: Convert to fraction form
    211,903.76/317,820.69 = 69,750.89/x
  3. Step 3: Cross multiply
    211,903.76x = 317,820.69 × 69,750.89
  4. Step 4: Simplify right side
    211,903.76x = 22,168,274,398.81
  5. Step 5: Solve for x
    x = 22,168,274,398.81/211,903.76
  6. Step 6: Final answer
    x = 104,614.83

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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.