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Finding the Fourth Proportional to 154,182.80, 212,768.16 and 87,114.80

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Solution

The fourth proportional to 154,182.80, 212,768.16 and 87,114.80 is: 120,216.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,182.80 : 212,768.16 = 87,114.80 : x
  2. Step 2: Convert to fraction form
    154,182.80/212,768.16 = 87,114.80/x
  3. Step 3: Cross multiply
    154,182.80x = 212,768.16 × 87,114.80
  4. Step 4: Simplify right side
    154,182.80x = 18,535,255,704.77
  5. Step 5: Solve for x
    x = 18,535,255,704.77/154,182.80
  6. Step 6: Final answer
    x = 120,216.11

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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.