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Finding the Fourth Proportional to 76,688.96, 105,722.40 and 75,636.80

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Solution

The fourth proportional to 76,688.96, 105,722.40 and 75,636.80 is: 104,271.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,688.96 : 105,722.40 = 75,636.80 : x
  2. Step 2: Convert to fraction form
    76,688.96/105,722.40 = 75,636.80/x
  3. Step 3: Cross multiply
    76,688.96x = 105,722.40 × 75,636.80
  4. Step 4: Simplify right side
    76,688.96x = 7,996,504,024.32
  5. Step 5: Solve for x
    x = 7,996,504,024.32/76,688.96
  6. Step 6: Final answer
    x = 104,271.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.