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Finding the Fourth Proportional to 132,485.40, 198,509.40 and 112,802.40

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Solution

The fourth proportional to 132,485.40, 198,509.40 and 112,802.40 is: 169,017.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,485.40 : 198,509.40 = 112,802.40 : x
  2. Step 2: Convert to fraction form
    132,485.40/198,509.40 = 112,802.40/x
  3. Step 3: Cross multiply
    132,485.40x = 198,509.40 × 112,802.40
  4. Step 4: Simplify right side
    132,485.40x = 22,392,336,742.56
  5. Step 5: Solve for x
    x = 22,392,336,742.56/132,485.40
  6. Step 6: Final answer
    x = 169,017.39

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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.