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Finding the Fourth Proportional to 57,986.70, 86,980.05 and 30,281.10

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Solution

The fourth proportional to 57,986.70, 86,980.05 and 30,281.10 is: 45,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,986.70 : 86,980.05 = 30,281.10 : x
  2. Step 2: Convert to fraction form
    57,986.70/86,980.05 = 30,281.10/x
  3. Step 3: Cross multiply
    57,986.70x = 86,980.05 × 30,281.10
  4. Step 4: Simplify right side
    57,986.70x = 2,633,851,592.06
  5. Step 5: Solve for x
    x = 2,633,851,592.06/57,986.70
  6. Step 6: Final answer
    x = 45,421.65

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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.