Home / 78,537.98-117,806.40-31,790.18

Finding the Fourth Proportional to 78,537.98, 117,806.40 and 31,790.18

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Solution

The fourth proportional to 78,537.98, 117,806.40 and 31,790.18 is: 47,685.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,537.98 : 117,806.40 = 31,790.18 : x
  2. Step 2: Convert to fraction form
    78,537.98/117,806.40 = 31,790.18/x
  3. Step 3: Cross multiply
    78,537.98x = 117,806.40 × 31,790.18
  4. Step 4: Simplify right side
    78,537.98x = 3,745,086,661.15
  5. Step 5: Solve for x
    x = 3,745,086,661.15/78,537.98
  6. Step 6: Final answer
    x = 47,685.04

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1.5x scale

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.