Home / 154,208.72-212,909.64-99,863.12

Finding the Fourth Proportional to 154,208.72, 212,909.64 and 99,863.12

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Solution

The fourth proportional to 154,208.72, 212,909.64 and 99,863.12 is: 137,876.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,208.72 : 212,909.64 = 99,863.12 : x
  2. Step 2: Convert to fraction form
    154,208.72/212,909.64 = 99,863.12/x
  3. Step 3: Cross multiply
    154,208.72x = 212,909.64 × 99,863.12
  4. Step 4: Simplify right side
    154,208.72x = 21,261,820,928.48
  5. Step 5: Solve for x
    x = 21,261,820,928.48/154,208.72
  6. Step 6: Final answer
    x = 137,876.90

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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.