Home / 130,123.40-195,206.70-51,240.20

Finding the Fourth Proportional to 130,123.40, 195,206.70 and 51,240.20

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Solution

The fourth proportional to 130,123.40, 195,206.70 and 51,240.20 is: 76,868.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,123.40 : 195,206.70 = 51,240.20 : x
  2. Step 2: Convert to fraction form
    130,123.40/195,206.70 = 51,240.20/x
  3. Step 3: Cross multiply
    130,123.40x = 195,206.70 × 51,240.20
  4. Step 4: Simplify right side
    130,123.40x = 10,002,430,349.34
  5. Step 5: Solve for x
    x = 10,002,430,349.34/130,123.40
  6. Step 6: Final answer
    x = 76,868.81

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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.