Home / 78,527.28-117,790.38-31,779.48

Finding the Fourth Proportional to 78,527.28, 117,790.38 and 31,779.48

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Solution

The fourth proportional to 78,527.28, 117,790.38 and 31,779.48 is: 47,669.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,527.28 : 117,790.38 = 31,779.48 : x
  2. Step 2: Convert to fraction form
    78,527.28/117,790.38 = 31,779.48/x
  3. Step 3: Cross multiply
    78,527.28x = 117,790.38 × 31,779.48
  4. Step 4: Simplify right side
    78,527.28x = 3,743,317,025.40
  5. Step 5: Solve for x
    x = 3,743,317,025.40/78,527.28
  6. Step 6: Final answer
    x = 47,669.00

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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.