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Finding the Fourth Proportional to 74,674.88, 103,050.54 and 42,848.78

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Solution

The fourth proportional to 74,674.88, 103,050.54 and 42,848.78 is: 59,130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,674.88 : 103,050.54 = 42,848.78 : x
  2. Step 2: Convert to fraction form
    74,674.88/103,050.54 = 42,848.78/x
  3. Step 3: Cross multiply
    74,674.88x = 103,050.54 × 42,848.78
  4. Step 4: Simplify right side
    74,674.88x = 4,415,589,917.34
  5. Step 5: Solve for x
    x = 4,415,589,917.34/74,674.88
  6. Step 6: Final answer
    x = 59,130.86

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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.