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Finding the Fourth Proportional to 139,133.34, 208,515.45 and 75,790.98

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Solution

The fourth proportional to 139,133.34, 208,515.45 and 75,790.98 is: 113,585.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,133.34 : 208,515.45 = 75,790.98 : x
  2. Step 2: Convert to fraction form
    139,133.34/208,515.45 = 75,790.98/x
  3. Step 3: Cross multiply
    139,133.34x = 208,515.45 × 75,790.98
  4. Step 4: Simplify right side
    139,133.34x = 15,803,590,300.64
  5. Step 5: Solve for x
    x = 15,803,590,300.64/139,133.34
  6. Step 6: Final answer
    x = 113,585.93

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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.