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Finding the Fourth Proportional to 139,021.70, 208,532.55 and 94,406.90

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Solution

The fourth proportional to 139,021.70, 208,532.55 and 94,406.90 is: 141,610.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,021.70 : 208,532.55 = 94,406.90 : x
  2. Step 2: Convert to fraction form
    139,021.70/208,532.55 = 94,406.90/x
  3. Step 3: Cross multiply
    139,021.70x = 208,532.55 × 94,406.90
  4. Step 4: Simplify right side
    139,021.70x = 19,686,911,594.60
  5. Step 5: Solve for x
    x = 19,686,911,594.60/139,021.70
  6. Step 6: Final answer
    x = 141,610.35

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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.