Home / 120,621.40-180,932.10-118,871.80

Finding the Fourth Proportional to 120,621.40, 180,932.10 and 118,871.80

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Solution

The fourth proportional to 120,621.40, 180,932.10 and 118,871.80 is: 178,307.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,621.40 : 180,932.10 = 118,871.80 : x
  2. Step 2: Convert to fraction form
    120,621.40/180,932.10 = 118,871.80/x
  3. Step 3: Cross multiply
    120,621.40x = 180,932.10 × 118,871.80
  4. Step 4: Simplify right side
    120,621.40x = 21,507,724,404.78
  5. Step 5: Solve for x
    x = 21,507,724,404.78/120,621.40
  6. Step 6: Final answer
    x = 178,307.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.