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Finding the Fourth Proportional to 74,703.64, 103,091.52 and 42,871.72

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Solution

The fourth proportional to 74,703.64, 103,091.52 and 42,871.72 is: 59,163.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,703.64 : 103,091.52 = 42,871.72 : x
  2. Step 2: Convert to fraction form
    74,703.64/103,091.52 = 42,871.72/x
  3. Step 3: Cross multiply
    74,703.64x = 103,091.52 × 42,871.72
  4. Step 4: Simplify right side
    74,703.64x = 4,419,710,779.81
  5. Step 5: Solve for x
    x = 4,419,710,779.81/74,703.64
  6. Step 6: Final answer
    x = 59,163.26

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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.