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Finding the Fourth Proportional to 252,411.48, 348,329.70 and 139,238.28

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Solution

The fourth proportional to 252,411.48, 348,329.70 and 139,238.28 is: 192,149.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,411.48 : 348,329.70 = 139,238.28 : x
  2. Step 2: Convert to fraction form
    252,411.48/348,329.70 = 139,238.28/x
  3. Step 3: Cross multiply
    252,411.48x = 348,329.70 × 139,238.28
  4. Step 4: Simplify right side
    252,411.48x = 48,500,828,300.92
  5. Step 5: Solve for x
    x = 48,500,828,300.92/252,411.48
  6. Step 6: Final answer
    x = 192,149.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.