Home / 140,123.10-209,953.80-80,855.40

Finding the Fourth Proportional to 140,123.10, 209,953.80 and 80,855.40

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Solution

The fourth proportional to 140,123.10, 209,953.80 and 80,855.40 is: 121,149.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,123.10 : 209,953.80 = 80,855.40 : x
  2. Step 2: Convert to fraction form
    140,123.10/209,953.80 = 80,855.40/x
  3. Step 3: Cross multiply
    140,123.10x = 209,953.80 × 80,855.40
  4. Step 4: Simplify right side
    140,123.10x = 16,975,898,480.52
  5. Step 5: Solve for x
    x = 16,975,898,480.52/140,123.10
  6. Step 6: Final answer
    x = 121,149.89

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1.5x scale

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.