Home / 85,979.38-128,981.98-26,819.68

Finding the Fourth Proportional to 85,979.38, 128,981.98 and 26,819.68

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Solution

The fourth proportional to 85,979.38, 128,981.98 and 26,819.68 is: 40,233.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.38 : 128,981.98 = 26,819.68 : x
  2. Step 2: Convert to fraction form
    85,979.38/128,981.98 = 26,819.68/x
  3. Step 3: Cross multiply
    85,979.38x = 128,981.98 × 26,819.68
  4. Step 4: Simplify right side
    85,979.38x = 3,459,255,429.37
  5. Step 5: Solve for x
    x = 3,459,255,429.37/85,979.38
  6. Step 6: Final answer
    x = 40,233.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.