Home / 120,144.48-165,698.80-90,000.64

Finding the Fourth Proportional to 120,144.48, 165,698.80 and 90,000.64

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Solution

The fourth proportional to 120,144.48, 165,698.80 and 90,000.64 is: 124,125.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,144.48 : 165,698.80 = 90,000.64 : x
  2. Step 2: Convert to fraction form
    120,144.48/165,698.80 = 90,000.64/x
  3. Step 3: Cross multiply
    120,144.48x = 165,698.80 × 90,000.64
  4. Step 4: Simplify right side
    120,144.48x = 14,912,998,047.23
  5. Step 5: Solve for x
    x = 14,912,998,047.23/120,144.48
  6. Step 6: Final answer
    x = 124,125.54

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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.