Home / 78,108.19-117,138.05-28,181.82

Finding the Fourth Proportional to 78,108.19, 117,138.05 and 28,181.82

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Solution

The fourth proportional to 78,108.19, 117,138.05 and 28,181.82 is: 42,263.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,108.19 : 117,138.05 = 28,181.82 : x
  2. Step 2: Convert to fraction form
    78,108.19/117,138.05 = 28,181.82/x
  3. Step 3: Cross multiply
    78,108.19x = 117,138.05 × 28,181.82
  4. Step 4: Simplify right side
    78,108.19x = 3,301,162,925.02
  5. Step 5: Solve for x
    x = 3,301,162,925.02/78,108.19
  6. Step 6: Final answer
    x = 42,263.98

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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.