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Finding the Fourth Proportional to 228,809.76, 315,757.54 and 139,385.76

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Solution

The fourth proportional to 228,809.76, 315,757.54 and 139,385.76 is: 192,352.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,809.76 : 315,757.54 = 139,385.76 : x
  2. Step 2: Convert to fraction form
    228,809.76/315,757.54 = 139,385.76/x
  3. Step 3: Cross multiply
    228,809.76x = 315,757.54 × 139,385.76
  4. Step 4: Simplify right side
    228,809.76x = 44,012,104,688.63
  5. Step 5: Solve for x
    x = 44,012,104,688.63/228,809.76
  6. Step 6: Final answer
    x = 192,352.39

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1.5x scale

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.