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Finding the Fourth Proportional to 139,869.20, 210,322.20 and 117,059.60

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Solution

The fourth proportional to 139,869.20, 210,322.20 and 117,059.60 is: 176,023.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,869.20 : 210,322.20 = 117,059.60 : x
  2. Step 2: Convert to fraction form
    139,869.20/210,322.20 = 117,059.60/x
  3. Step 3: Cross multiply
    139,869.20x = 210,322.20 × 117,059.60
  4. Step 4: Simplify right side
    139,869.20x = 24,620,232,603.12
  5. Step 5: Solve for x
    x = 24,620,232,603.12/139,869.20
  6. Step 6: Final answer
    x = 176,023.26

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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.