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Finding the Fourth Proportional to 76,980.60, 115,262.46 and 39,966.84

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Solution

The fourth proportional to 76,980.60, 115,262.46 and 39,966.84 is: 59,842.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,980.60 : 115,262.46 = 39,966.84 : x
  2. Step 2: Convert to fraction form
    76,980.60/115,262.46 = 39,966.84/x
  3. Step 3: Cross multiply
    76,980.60x = 115,262.46 × 39,966.84
  4. Step 4: Simplify right side
    76,980.60x = 4,606,676,296.83
  5. Step 5: Solve for x
    x = 4,606,676,296.83/76,980.60
  6. Step 6: Final answer
    x = 59,842.04

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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.