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Finding the Fourth Proportional to 57,975.93, 86,980.50 and 28,402.43

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Solution

The fourth proportional to 57,975.93, 86,980.50 and 28,402.43 is: 42,611.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,975.93 : 86,980.50 = 28,402.43 : x
  2. Step 2: Convert to fraction form
    57,975.93/86,980.50 = 28,402.43/x
  3. Step 3: Cross multiply
    57,975.93x = 86,980.50 × 28,402.43
  4. Step 4: Simplify right side
    57,975.93x = 2,470,457,127.71
  5. Step 5: Solve for x
    x = 2,470,457,127.71/57,975.93
  6. Step 6: Final answer
    x = 42,611.77

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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.