Home / 130,687.35-180,321.04-85,431.63

Finding the Fourth Proportional to 130,687.35, 180,321.04 and 85,431.63

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Solution

The fourth proportional to 130,687.35, 180,321.04 and 85,431.63 is: 117,877.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,687.35 : 180,321.04 = 85,431.63 : x
  2. Step 2: Convert to fraction form
    130,687.35/180,321.04 = 85,431.63/x
  3. Step 3: Cross multiply
    130,687.35x = 180,321.04 × 85,431.63
  4. Step 4: Simplify right side
    130,687.35x = 15,405,119,943.34
  5. Step 5: Solve for x
    x = 15,405,119,943.34/130,687.35
  6. Step 6: Final answer
    x = 117,877.67

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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.