Home / 78,667.20-108,562.08-42,859.20

Finding the Fourth Proportional to 78,667.20, 108,562.08 and 42,859.20

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Solution

The fourth proportional to 78,667.20, 108,562.08 and 42,859.20 is: 59,146.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,667.20 : 108,562.08 = 42,859.20 : x
  2. Step 2: Convert to fraction form
    78,667.20/108,562.08 = 42,859.20/x
  3. Step 3: Cross multiply
    78,667.20x = 108,562.08 × 42,859.20
  4. Step 4: Simplify right side
    78,667.20x = 4,652,883,899.14
  5. Step 5: Solve for x
    x = 4,652,883,899.14/78,667.20
  6. Step 6: Final answer
    x = 59,146.43

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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.