Home / 139,787.04-192,909.60-76,128.32

Finding the Fourth Proportional to 139,787.04, 192,909.60 and 76,128.32

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Solution

The fourth proportional to 139,787.04, 192,909.60 and 76,128.32 is: 105,058.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,787.04 : 192,909.60 = 76,128.32 : x
  2. Step 2: Convert to fraction form
    139,787.04/192,909.60 = 76,128.32/x
  3. Step 3: Cross multiply
    139,787.04x = 192,909.60 × 76,128.32
  4. Step 4: Simplify right side
    139,787.04x = 14,685,883,759.87
  5. Step 5: Solve for x
    x = 14,685,883,759.87/139,787.04
  6. Step 6: Final answer
    x = 105,058.98

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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.