Home / 129,547.92-178,788.88-75,829.68

Finding the Fourth Proportional to 129,547.92, 178,788.88 and 75,829.68

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Solution

The fourth proportional to 129,547.92, 178,788.88 and 75,829.68 is: 104,652.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,547.92 : 178,788.88 = 75,829.68 : x
  2. Step 2: Convert to fraction form
    129,547.92/178,788.88 = 75,829.68/x
  3. Step 3: Cross multiply
    129,547.92x = 178,788.88 × 75,829.68
  4. Step 4: Simplify right side
    129,547.92x = 13,557,503,557.96
  5. Step 5: Solve for x
    x = 13,557,503,557.96/129,547.92
  6. Step 6: Final answer
    x = 104,652.42

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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.