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Finding the Fourth Proportional to 211,275.87, 316,846.90 and 69,088.30

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Solution

The fourth proportional to 211,275.87, 316,846.90 and 69,088.30 is: 103,610.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,275.87 : 316,846.90 = 69,088.30 : x
  2. Step 2: Convert to fraction form
    211,275.87/316,846.90 = 69,088.30/x
  3. Step 3: Cross multiply
    211,275.87x = 316,846.90 × 69,088.30
  4. Step 4: Simplify right side
    211,275.87x = 21,890,412,269.76
  5. Step 5: Solve for x
    x = 21,890,412,269.76/211,275.87
  6. Step 6: Final answer
    x = 103,610.57

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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.