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Finding the Fourth Proportional to 130,521.70, 195,782.55 and 78,033.70

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Solution

The fourth proportional to 130,521.70, 195,782.55 and 78,033.70 is: 117,050.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,521.70 : 195,782.55 = 78,033.70 : x
  2. Step 2: Convert to fraction form
    130,521.70/195,782.55 = 78,033.70/x
  3. Step 3: Cross multiply
    130,521.70x = 195,782.55 × 78,033.70
  4. Step 4: Simplify right side
    130,521.70x = 15,277,636,771.94
  5. Step 5: Solve for x
    x = 15,277,636,771.94/130,521.70
  6. Step 6: Final answer
    x = 117,050.55

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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.