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Finding the Fourth Proportional to 130,128.80, 195,063.60 and 59,885.60

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Solution

The fourth proportional to 130,128.80, 195,063.60 and 59,885.60 is: 89,768.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,128.80 : 195,063.60 = 59,885.60 : x
  2. Step 2: Convert to fraction form
    130,128.80/195,063.60 = 59,885.60/x
  3. Step 3: Cross multiply
    130,128.80x = 195,063.60 × 59,885.60
  4. Step 4: Simplify right side
    130,128.80x = 11,681,500,724.16
  5. Step 5: Solve for x
    x = 11,681,500,724.16/130,128.80
  6. Step 6: Final answer
    x = 89,768.76

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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.