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Finding the Fourth Proportional to 145,210.60, 217,815.90 and 120,634.60

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Solution

The fourth proportional to 145,210.60, 217,815.90 and 120,634.60 is: 180,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,210.60 : 217,815.90 = 120,634.60 : x
  2. Step 2: Convert to fraction form
    145,210.60/217,815.90 = 120,634.60/x
  3. Step 3: Cross multiply
    145,210.60x = 217,815.90 × 120,634.60
  4. Step 4: Simplify right side
    145,210.60x = 26,276,133,970.14
  5. Step 5: Solve for x
    x = 26,276,133,970.14/145,210.60
  6. Step 6: Final answer
    x = 180,951.90

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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.