Home / 128,819.84-177,780.83-71,468.19

Finding the Fourth Proportional to 128,819.84, 177,780.83 and 71,468.19

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Solution

The fourth proportional to 128,819.84, 177,780.83 and 71,468.19 is: 98,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,819.84 : 177,780.83 = 71,468.19 : x
  2. Step 2: Convert to fraction form
    128,819.84/177,780.83 = 71,468.19/x
  3. Step 3: Cross multiply
    128,819.84x = 177,780.83 × 71,468.19
  4. Step 4: Simplify right side
    128,819.84x = 12,705,673,779.46
  5. Step 5: Solve for x
    x = 12,705,673,779.46/128,819.84
  6. Step 6: Final answer
    x = 98,631.35

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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.