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Finding the Fourth Proportional to 145,990.67, 218,986.01 and 57,285.95

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Solution

The fourth proportional to 145,990.67, 218,986.01 and 57,285.95 is: 85,928.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,990.67 : 218,986.01 = 57,285.95 : x
  2. Step 2: Convert to fraction form
    145,990.67/218,986.01 = 57,285.95/x
  3. Step 3: Cross multiply
    145,990.67x = 218,986.01 × 57,285.95
  4. Step 4: Simplify right side
    145,990.67x = 12,544,821,333.13
  5. Step 5: Solve for x
    x = 12,544,821,333.13/145,990.67
  6. Step 6: Final answer
    x = 85,928.93

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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.