Home / 83,905.12-125,879.48-31,315

Finding the Fourth Proportional to 83,905.12, 125,879.48 and 31,315

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Solution

The fourth proportional to 83,905.12, 125,879.48 and 31,315 is: 46,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,905.12 : 125,879.48 = 31,315 : x
  2. Step 2: Convert to fraction form
    83,905.12/125,879.48 = 31,315/x
  3. Step 3: Cross multiply
    83,905.12x = 125,879.48 × 31,315
  4. Step 4: Simplify right side
    83,905.12x = 3,941,915,916.20
  5. Step 5: Solve for x
    x = 3,941,915,916.20/83,905.12
  6. Step 6: Final answer
    x = 46,980.64

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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.