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Finding the Fourth Proportional to 57,430.41, 86,145.62 and 17,990.61

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Solution

The fourth proportional to 57,430.41, 86,145.62 and 17,990.61 is: 26,985.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,430.41 : 86,145.62 = 17,990.61 : x
  2. Step 2: Convert to fraction form
    57,430.41/86,145.62 = 17,990.61/x
  3. Step 3: Cross multiply
    57,430.41x = 86,145.62 × 17,990.61
  4. Step 4: Simplify right side
    57,430.41x = 1,549,812,162.68
  5. Step 5: Solve for x
    x = 1,549,812,162.68/57,430.41
  6. Step 6: Final answer
    x = 26,985.92

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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.