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Finding the Fourth Proportional to 170,661.40, 255,408.90 and 149,666.20

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Solution

The fourth proportional to 170,661.40, 255,408.90 and 149,666.20 is: 223,987.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,661.40 : 255,408.90 = 149,666.20 : x
  2. Step 2: Convert to fraction form
    170,661.40/255,408.90 = 149,666.20/x
  3. Step 3: Cross multiply
    170,661.40x = 255,408.90 × 149,666.20
  4. Step 4: Simplify right side
    170,661.40x = 38,226,079,509.18
  5. Step 5: Solve for x
    x = 38,226,079,509.18/170,661.40
  6. Step 6: Final answer
    x = 223,987.85

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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.