Home / 78,257.89-117,051.83-72,585.36

Finding the Fourth Proportional to 78,257.89, 117,051.83 and 72,585.36

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Solution

The fourth proportional to 78,257.89, 117,051.83 and 72,585.36 is: 108,567.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,257.89 : 117,051.83 = 72,585.36 : x
  2. Step 2: Convert to fraction form
    78,257.89/117,051.83 = 72,585.36/x
  3. Step 3: Cross multiply
    78,257.89x = 117,051.83 × 72,585.36
  4. Step 4: Simplify right side
    78,257.89x = 8,496,248,856.28
  5. Step 5: Solve for x
    x = 8,496,248,856.28/78,257.89
  6. Step 6: Final answer
    x = 108,567.32

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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.