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Finding the Fourth Proportional to 76,665.60, 114,998.40 and 39,211.20

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Solution

The fourth proportional to 76,665.60, 114,998.40 and 39,211.20 is: 58,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,665.60 : 114,998.40 = 39,211.20 : x
  2. Step 2: Convert to fraction form
    76,665.60/114,998.40 = 39,211.20/x
  3. Step 3: Cross multiply
    76,665.60x = 114,998.40 × 39,211.20
  4. Step 4: Simplify right side
    76,665.60x = 4,509,225,262.08
  5. Step 5: Solve for x
    x = 4,509,225,262.08/76,665.60
  6. Step 6: Final answer
    x = 58,816.80

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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.