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Finding the Fourth Proportional to 154,421.80, 231,459.90 and 87,893.80

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Solution

The fourth proportional to 154,421.80, 231,459.90 and 87,893.80 is: 131,742.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,421.80 : 231,459.90 = 87,893.80 : x
  2. Step 2: Convert to fraction form
    154,421.80/231,459.90 = 87,893.80/x
  3. Step 3: Cross multiply
    154,421.80x = 231,459.90 × 87,893.80
  4. Step 4: Simplify right side
    154,421.80x = 20,343,890,158.62
  5. Step 5: Solve for x
    x = 20,343,890,158.62/154,421.80
  6. Step 6: Final answer
    x = 131,742.35

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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.