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Finding the Fourth Proportional to 217,689.94, 326,661.02 and 91,319

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Solution

The fourth proportional to 217,689.94, 326,661.02 and 91,319 is: 137,031.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,689.94 : 326,661.02 = 91,319 : x
  2. Step 2: Convert to fraction form
    217,689.94/326,661.02 = 91,319/x
  3. Step 3: Cross multiply
    217,689.94x = 326,661.02 × 91,319
  4. Step 4: Simplify right side
    217,689.94x = 29,830,357,228.79
  5. Step 5: Solve for x
    x = 29,830,357,228.79/217,689.94
  6. Step 6: Final answer
    x = 137,031.40

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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.