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Finding the Fourth Proportional to 76,996.40, 115,429.80 and 40,060.40

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Solution

The fourth proportional to 76,996.40, 115,429.80 and 40,060.40 is: 60,056.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,996.40 : 115,429.80 = 40,060.40 : x
  2. Step 2: Convert to fraction form
    76,996.40/115,429.80 = 40,060.40/x
  3. Step 3: Cross multiply
    76,996.40x = 115,429.80 × 40,060.40
  4. Step 4: Simplify right side
    76,996.40x = 4,624,163,959.92
  5. Step 5: Solve for x
    x = 4,624,163,959.92/76,996.40
  6. Step 6: Final answer
    x = 60,056.89

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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.