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Finding the Fourth Proportional to 70,252, 105,378.06 and 28,699

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Solution

The fourth proportional to 70,252, 105,378.06 and 28,699 is: 43,048.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,252 : 105,378.06 = 28,699 : x
  2. Step 2: Convert to fraction form
    70,252/105,378.06 = 28,699/x
  3. Step 3: Cross multiply
    70,252x = 105,378.06 × 28,699
  4. Step 4: Simplify right side
    70,252x = 3,024,244,943.94
  5. Step 5: Solve for x
    x = 3,024,244,943.94/70,252
  6. Step 6: Final answer
    x = 43,048.52

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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.