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Finding the Fourth Proportional to 139,905.77, 209,920.61 and 73,330.07

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Solution

The fourth proportional to 139,905.77, 209,920.61 and 73,330.07 is: 110,027.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,905.77 : 209,920.61 = 73,330.07 : x
  2. Step 2: Convert to fraction form
    139,905.77/209,920.61 = 73,330.07/x
  3. Step 3: Cross multiply
    139,905.77x = 209,920.61 × 73,330.07
  4. Step 4: Simplify right side
    139,905.77x = 15,393,492,159.46
  5. Step 5: Solve for x
    x = 15,393,492,159.46/139,905.77
  6. Step 6: Final answer
    x = 110,027.58

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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.