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Finding the Fourth Proportional to 58,931.20, 88,396.80 and 40,268.80

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Solution

The fourth proportional to 58,931.20, 88,396.80 and 40,268.80 is: 60,403.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,931.20 : 88,396.80 = 40,268.80 : x
  2. Step 2: Convert to fraction form
    58,931.20/88,396.80 = 40,268.80/x
  3. Step 3: Cross multiply
    58,931.20x = 88,396.80 × 40,268.80
  4. Step 4: Simplify right side
    58,931.20x = 3,559,633,059.84
  5. Step 5: Solve for x
    x = 3,559,633,059.84/58,931.20
  6. Step 6: Final answer
    x = 60,403.20

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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.