Home / 131,083.72-180,915-80,125.84

Finding the Fourth Proportional to 131,083.72, 180,915 and 80,125.84

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Solution

The fourth proportional to 131,083.72, 180,915 and 80,125.84 is: 110,585.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,083.72 : 180,915 = 80,125.84 : x
  2. Step 2: Convert to fraction form
    131,083.72/180,915 = 80,125.84/x
  3. Step 3: Cross multiply
    131,083.72x = 180,915 × 80,125.84
  4. Step 4: Simplify right side
    131,083.72x = 14,495,966,343.60
  5. Step 5: Solve for x
    x = 14,495,966,343.60/131,083.72
  6. Step 6: Final answer
    x = 110,585.56

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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.