Home / 78,538.74-117,815.40-31,795.26

Finding the Fourth Proportional to 78,538.74, 117,815.40 and 31,795.26

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Solution

The fourth proportional to 78,538.74, 117,815.40 and 31,795.26 is: 47,695.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,538.74 : 117,815.40 = 31,795.26 : x
  2. Step 2: Convert to fraction form
    78,538.74/117,815.40 = 31,795.26/x
  3. Step 3: Cross multiply
    78,538.74x = 117,815.40 × 31,795.26
  4. Step 4: Simplify right side
    78,538.74x = 3,745,971,275.00
  5. Step 5: Solve for x
    x = 3,745,971,275.00/78,538.74
  6. Step 6: Final answer
    x = 47,695.84

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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.