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Finding the Fourth Proportional to 139,030.08, 208,524 and 45,533.76

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Solution

The fourth proportional to 139,030.08, 208,524 and 45,533.76 is: 68,293.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,030.08 : 208,524 = 45,533.76 : x
  2. Step 2: Convert to fraction form
    139,030.08/208,524 = 45,533.76/x
  3. Step 3: Cross multiply
    139,030.08x = 208,524 × 45,533.76
  4. Step 4: Simplify right side
    139,030.08x = 9,494,881,770.24
  5. Step 5: Solve for x
    x = 9,494,881,770.24/139,030.08
  6. Step 6: Final answer
    x = 68,293.72

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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.