Home / 77,990.40-116,995.31-25,385.76

Finding the Fourth Proportional to 77,990.40, 116,995.31 and 25,385.76

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Solution

The fourth proportional to 77,990.40, 116,995.31 and 25,385.76 is: 38,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,990.40 : 116,995.31 = 25,385.76 : x
  2. Step 2: Convert to fraction form
    77,990.40/116,995.31 = 25,385.76/x
  3. Step 3: Cross multiply
    77,990.40x = 116,995.31 × 25,385.76
  4. Step 4: Simplify right side
    77,990.40x = 2,970,014,860.79
  5. Step 5: Solve for x
    x = 2,970,014,860.79/77,990.40
  6. Step 6: Final answer
    x = 38,081.80

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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.