Home / 78,450.08-117,638.16-28,494.96

Finding the Fourth Proportional to 78,450.08, 117,638.16 and 28,494.96

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Solution

The fourth proportional to 78,450.08, 117,638.16 and 28,494.96 is: 42,729.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,450.08 : 117,638.16 = 28,494.96 : x
  2. Step 2: Convert to fraction form
    78,450.08/117,638.16 = 28,494.96/x
  3. Step 3: Cross multiply
    78,450.08x = 117,638.16 × 28,494.96
  4. Step 4: Simplify right side
    78,450.08x = 3,352,094,663.67
  5. Step 5: Solve for x
    x = 3,352,094,663.67/78,450.08
  6. Step 6: Final answer
    x = 42,729.02

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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.