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Finding the Fourth Proportional to 139,437.45, 192,423.71 and 75,775.09

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Solution

The fourth proportional to 139,437.45, 192,423.71 and 75,775.09 is: 104,569.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,437.45 : 192,423.71 = 75,775.09 : x
  2. Step 2: Convert to fraction form
    139,437.45/192,423.71 = 75,775.09/x
  3. Step 3: Cross multiply
    139,437.45x = 192,423.71 × 75,775.09
  4. Step 4: Simplify right side
    139,437.45x = 14,580,923,943.38
  5. Step 5: Solve for x
    x = 14,580,923,943.38/139,437.45
  6. Step 6: Final answer
    x = 104,569.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.