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Finding the Fourth Proportional to 77,987, 116,992.66 and 25,384.08

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Solution

The fourth proportional to 77,987, 116,992.66 and 25,384.08 is: 38,080.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,987 : 116,992.66 = 25,384.08 : x
  2. Step 2: Convert to fraction form
    77,987/116,992.66 = 25,384.08/x
  3. Step 3: Cross multiply
    77,987x = 116,992.66 × 25,384.08
  4. Step 4: Simplify right side
    77,987x = 2,969,751,040.85
  5. Step 5: Solve for x
    x = 2,969,751,040.85/77,987
  6. Step 6: Final answer
    x = 38,080.08

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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.