Home / 76,281.10-114,421.65-20,121.10

Finding the Fourth Proportional to 76,281.10, 114,421.65 and 20,121.10

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Solution

The fourth proportional to 76,281.10, 114,421.65 and 20,121.10 is: 30,181.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,281.10 : 114,421.65 = 20,121.10 : x
  2. Step 2: Convert to fraction form
    76,281.10/114,421.65 = 20,121.10/x
  3. Step 3: Cross multiply
    76,281.10x = 114,421.65 × 20,121.10
  4. Step 4: Simplify right side
    76,281.10x = 2,302,289,461.82
  5. Step 5: Solve for x
    x = 2,302,289,461.82/76,281.10
  6. Step 6: Final answer
    x = 30,181.65

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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.