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Finding the Fourth Proportional to 84,043.86, 115,978.96 and 45,803.70

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Solution

The fourth proportional to 84,043.86, 115,978.96 and 45,803.70 is: 63,208.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,043.86 : 115,978.96 = 45,803.70 : x
  2. Step 2: Convert to fraction form
    84,043.86/115,978.96 = 45,803.70/x
  3. Step 3: Cross multiply
    84,043.86x = 115,978.96 × 45,803.70
  4. Step 4: Simplify right side
    84,043.86x = 5,312,265,490.15
  5. Step 5: Solve for x
    x = 5,312,265,490.15/84,043.86
  6. Step 6: Final answer
    x = 63,208.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.