Home / 129,404.64-178,577.04-72,043.08

Finding the Fourth Proportional to 129,404.64, 178,577.04 and 72,043.08

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Solution

The fourth proportional to 129,404.64, 178,577.04 and 72,043.08 is: 99,418.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,404.64 : 178,577.04 = 72,043.08 : x
  2. Step 2: Convert to fraction form
    129,404.64/178,577.04 = 72,043.08/x
  3. Step 3: Cross multiply
    129,404.64x = 178,577.04 × 72,043.08
  4. Step 4: Simplify right side
    129,404.64x = 12,865,239,978.88
  5. Step 5: Solve for x
    x = 12,865,239,978.88/129,404.64
  6. Step 6: Final answer
    x = 99,418.69

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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.