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Finding the Fourth Proportional to 260,087.70, 390,131.55 and 102,263.70

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Solution

The fourth proportional to 260,087.70, 390,131.55 and 102,263.70 is: 153,395.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,087.70 : 390,131.55 = 102,263.70 : x
  2. Step 2: Convert to fraction form
    260,087.70/390,131.55 = 102,263.70/x
  3. Step 3: Cross multiply
    260,087.70x = 390,131.55 × 102,263.70
  4. Step 4: Simplify right side
    260,087.70x = 39,896,295,789.74
  5. Step 5: Solve for x
    x = 39,896,295,789.74/260,087.70
  6. Step 6: Final answer
    x = 153,395.55

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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.