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Finding the Fourth Proportional to 145,470.36, 218,205.36 and 45,639.30

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Solution

The fourth proportional to 145,470.36, 218,205.36 and 45,639.30 is: 68,458.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,470.36 : 218,205.36 = 45,639.30 : x
  2. Step 2: Convert to fraction form
    145,470.36/218,205.36 = 45,639.30/x
  3. Step 3: Cross multiply
    145,470.36x = 218,205.36 × 45,639.30
  4. Step 4: Simplify right side
    145,470.36x = 9,958,739,886.65
  5. Step 5: Solve for x
    x = 9,958,739,886.65/145,470.36
  6. Step 6: Final answer
    x = 68,458.89

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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.