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Finding the Fourth Proportional to 57,718.60, 86,594.10 and 28,137.40

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Solution

The fourth proportional to 57,718.60, 86,594.10 and 28,137.40 is: 42,214.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,718.60 : 86,594.10 = 28,137.40 : x
  2. Step 2: Convert to fraction form
    57,718.60/86,594.10 = 28,137.40/x
  3. Step 3: Cross multiply
    57,718.60x = 86,594.10 × 28,137.40
  4. Step 4: Simplify right side
    57,718.60x = 2,436,532,829.34
  5. Step 5: Solve for x
    x = 2,436,532,829.34/57,718.60
  6. Step 6: Final answer
    x = 42,214.00

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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.