Home / 135,289.85-186,737.60-78,712.16

Finding the Fourth Proportional to 135,289.85, 186,737.60 and 78,712.16

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Solution

The fourth proportional to 135,289.85, 186,737.60 and 78,712.16 is: 108,644.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,289.85 : 186,737.60 = 78,712.16 : x
  2. Step 2: Convert to fraction form
    135,289.85/186,737.60 = 78,712.16/x
  3. Step 3: Cross multiply
    135,289.85x = 186,737.60 × 78,712.16
  4. Step 4: Simplify right side
    135,289.85x = 14,698,519,112.31
  5. Step 5: Solve for x
    x = 14,698,519,112.31/135,289.85
  6. Step 6: Final answer
    x = 108,644.66

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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.