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Finding the Fourth Proportional to 76,661.65, 114,983.38 and 20,506.10

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Solution

The fourth proportional to 76,661.65, 114,983.38 and 20,506.10 is: 30,756.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,661.65 : 114,983.38 = 20,506.10 : x
  2. Step 2: Convert to fraction form
    76,661.65/114,983.38 = 20,506.10/x
  3. Step 3: Cross multiply
    76,661.65x = 114,983.38 × 20,506.10
  4. Step 4: Simplify right side
    76,661.65x = 2,357,860,688.62
  5. Step 5: Solve for x
    x = 2,357,860,688.62/76,661.65
  6. Step 6: Final answer
    x = 30,756.72

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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.