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Finding the Fourth Proportional to 259,385.70, 389,114.97 and 90,867.45

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Solution

The fourth proportional to 259,385.70, 389,114.97 and 90,867.45 is: 136,313.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,385.70 : 389,114.97 = 90,867.45 : x
  2. Step 2: Convert to fraction form
    259,385.70/389,114.97 = 90,867.45/x
  3. Step 3: Cross multiply
    259,385.70x = 389,114.97 × 90,867.45
  4. Step 4: Simplify right side
    259,385.70x = 35,357,885,080.73
  5. Step 5: Solve for x
    x = 35,357,885,080.73/259,385.70
  6. Step 6: Final answer
    x = 136,313.93

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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.