Home / 78,442.63-117,616.47-31,640.83

Finding the Fourth Proportional to 78,442.63, 117,616.47 and 31,640.83

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Solution

The fourth proportional to 78,442.63, 117,616.47 and 31,640.83 is: 47,442.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,442.63 : 117,616.47 = 31,640.83 : x
  2. Step 2: Convert to fraction form
    78,442.63/117,616.47 = 31,640.83/x
  3. Step 3: Cross multiply
    78,442.63x = 117,616.47 × 31,640.83
  4. Step 4: Simplify right side
    78,442.63x = 3,721,482,732.47
  5. Step 5: Solve for x
    x = 3,721,482,732.47/78,442.63
  6. Step 6: Final answer
    x = 47,442.10

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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.