Home / 99,121.32-136,779.18-54,409.32

Finding the Fourth Proportional to 99,121.32, 136,779.18 and 54,409.32

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Solution

The fourth proportional to 99,121.32, 136,779.18 and 54,409.32 is: 75,080.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,121.32 : 136,779.18 = 54,409.32 : x
  2. Step 2: Convert to fraction form
    99,121.32/136,779.18 = 54,409.32/x
  3. Step 3: Cross multiply
    99,121.32x = 136,779.18 × 54,409.32
  4. Step 4: Simplify right side
    99,121.32x = 7,442,062,173.96
  5. Step 5: Solve for x
    x = 7,442,062,173.96/99,121.32
  6. Step 6: Final answer
    x = 75,080.34

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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.