Home / 78,117.39-117,181.53-31,370.25

Finding the Fourth Proportional to 78,117.39, 117,181.53 and 31,370.25

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Solution

The fourth proportional to 78,117.39, 117,181.53 and 31,370.25 is: 47,057.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,117.39 : 117,181.53 = 31,370.25 : x
  2. Step 2: Convert to fraction form
    78,117.39/117,181.53 = 31,370.25/x
  3. Step 3: Cross multiply
    78,117.39x = 117,181.53 × 31,370.25
  4. Step 4: Simplify right side
    78,117.39x = 3,676,013,891.48
  5. Step 5: Solve for x
    x = 3,676,013,891.48/78,117.39
  6. Step 6: Final answer
    x = 47,057.56

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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.