Home / 154,188.80-212,779.52-87,120.64

Finding the Fourth Proportional to 154,188.80, 212,779.52 and 87,120.64

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Solution

The fourth proportional to 154,188.80, 212,779.52 and 87,120.64 is: 120,225.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,188.80 : 212,779.52 = 87,120.64 : x
  2. Step 2: Convert to fraction form
    154,188.80/212,779.52 = 87,120.64/x
  3. Step 3: Cross multiply
    154,188.80x = 212,779.52 × 87,120.64
  4. Step 4: Simplify right side
    154,188.80x = 18,537,487,961.29
  5. Step 5: Solve for x
    x = 18,537,487,961.29/154,188.80
  6. Step 6: Final answer
    x = 120,225.90

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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.