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Finding the Fourth Proportional to 77,989.90, 116,994.57 and 25,385.26

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Solution

The fourth proportional to 77,989.90, 116,994.57 and 25,385.26 is: 38,081.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,989.90 : 116,994.57 = 25,385.26 : x
  2. Step 2: Convert to fraction form
    77,989.90/116,994.57 = 25,385.26/x
  3. Step 3: Cross multiply
    77,989.90x = 116,994.57 × 25,385.26
  4. Step 4: Simplify right side
    77,989.90x = 2,969,936,866.14
  5. Step 5: Solve for x
    x = 2,969,936,866.14/77,989.90
  6. Step 6: Final answer
    x = 38,081.05

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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.