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Finding the Fourth Proportional to 211,205.67, 316,782.08 and 69,039.05

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Solution

The fourth proportional to 211,205.67, 316,782.08 and 69,039.05 is: 103,549.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,205.67 : 316,782.08 = 69,039.05 : x
  2. Step 2: Convert to fraction form
    211,205.67/316,782.08 = 69,039.05/x
  3. Step 3: Cross multiply
    211,205.67x = 316,782.08 × 69,039.05
  4. Step 4: Simplify right side
    211,205.67x = 21,870,331,931.12
  5. Step 5: Solve for x
    x = 21,870,331,931.12/211,205.67
  6. Step 6: Final answer
    x = 103,549.93

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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.