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Finding the Fourth Proportional to 70,470.65, 105,711.17 and 30,528.39

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Solution

The fourth proportional to 70,470.65, 105,711.17 and 30,528.39 is: 45,794.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,470.65 : 105,711.17 = 30,528.39 : x
  2. Step 2: Convert to fraction form
    70,470.65/105,711.17 = 30,528.39/x
  3. Step 3: Cross multiply
    70,470.65x = 105,711.17 × 30,528.39
  4. Step 4: Simplify right side
    70,470.65x = 3,227,191,825.12
  5. Step 5: Solve for x
    x = 3,227,191,825.12/70,470.65
  6. Step 6: Final answer
    x = 45,794.84

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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.