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Finding the Fourth Proportional to 43,985.46, 65,978.19 and 14,403.45

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Solution

The fourth proportional to 43,985.46, 65,978.19 and 14,403.45 is: 21,605.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,985.46 : 65,978.19 = 14,403.45 : x
  2. Step 2: Convert to fraction form
    43,985.46/65,978.19 = 14,403.45/x
  3. Step 3: Cross multiply
    43,985.46x = 65,978.19 × 14,403.45
  4. Step 4: Simplify right side
    43,985.46x = 950,313,560.76
  5. Step 5: Solve for x
    x = 950,313,560.76/43,985.46
  6. Step 6: Final answer
    x = 21,605.18

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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.