Home / 83,640.08-115,431.50-47,835.36

Finding the Fourth Proportional to 83,640.08, 115,431.50 and 47,835.36

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Solution

The fourth proportional to 83,640.08, 115,431.50 and 47,835.36 is: 66,017.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,640.08 : 115,431.50 = 47,835.36 : x
  2. Step 2: Convert to fraction form
    83,640.08/115,431.50 = 47,835.36/x
  3. Step 3: Cross multiply
    83,640.08x = 115,431.50 × 47,835.36
  4. Step 4: Simplify right side
    83,640.08x = 5,521,707,357.84
  5. Step 5: Solve for x
    x = 5,521,707,357.84/83,640.08
  6. Step 6: Final answer
    x = 66,017.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.