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Finding the Fourth Proportional to 57,969.66, 86,811.93 and 28,291.80

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Solution

The fourth proportional to 57,969.66, 86,811.93 and 28,291.80 is: 42,368.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,969.66 : 86,811.93 = 28,291.80 : x
  2. Step 2: Convert to fraction form
    57,969.66/86,811.93 = 28,291.80/x
  3. Step 3: Cross multiply
    57,969.66x = 86,811.93 × 28,291.80
  4. Step 4: Simplify right side
    57,969.66x = 2,456,065,761.17
  5. Step 5: Solve for x
    x = 2,456,065,761.17/57,969.66
  6. Step 6: Final answer
    x = 42,368.12

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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.