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Finding the Fourth Proportional to 59,903.60, 89,812.20 and 39,138.80

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Solution

The fourth proportional to 59,903.60, 89,812.20 and 39,138.80 is: 58,679.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,903.60 : 89,812.20 = 39,138.80 : x
  2. Step 2: Convert to fraction form
    59,903.60/89,812.20 = 39,138.80/x
  3. Step 3: Cross multiply
    59,903.60x = 89,812.20 × 39,138.80
  4. Step 4: Simplify right side
    59,903.60x = 3,515,141,733.36
  5. Step 5: Solve for x
    x = 3,515,141,733.36/59,903.60
  6. Step 6: Final answer
    x = 58,679.97

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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.