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Finding the Fourth Proportional to 76,510.65, 114,756.84 and 20,354.88

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Solution

The fourth proportional to 76,510.65, 114,756.84 and 20,354.88 is: 30,529.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,510.65 : 114,756.84 = 20,354.88 : x
  2. Step 2: Convert to fraction form
    76,510.65/114,756.84 = 20,354.88/x
  3. Step 3: Cross multiply
    76,510.65x = 114,756.84 × 20,354.88
  4. Step 4: Simplify right side
    76,510.65x = 2,335,861,707.38
  5. Step 5: Solve for x
    x = 2,335,861,707.38/76,510.65
  6. Step 6: Final answer
    x = 30,529.89

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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.