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Finding the Fourth Proportional to 261,347.90, 391,975.08 and 69,223.64

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Solution

The fourth proportional to 261,347.90, 391,975.08 and 69,223.64 is: 103,823.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,347.90 : 391,975.08 = 69,223.64 : x
  2. Step 2: Convert to fraction form
    261,347.90/391,975.08 = 69,223.64/x
  3. Step 3: Cross multiply
    261,347.90x = 391,975.08 × 69,223.64
  4. Step 4: Simplify right side
    261,347.90x = 27,133,941,826.89
  5. Step 5: Solve for x
    x = 27,133,941,826.89/261,347.90
  6. Step 6: Final answer
    x = 103,823.07

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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.