Home / 85,936.20-128,904.30-84,769.80

Finding the Fourth Proportional to 85,936.20, 128,904.30 and 84,769.80

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Solution

The fourth proportional to 85,936.20, 128,904.30 and 84,769.80 is: 127,154.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,936.20 : 128,904.30 = 84,769.80 : x
  2. Step 2: Convert to fraction form
    85,936.20/128,904.30 = 84,769.80/x
  3. Step 3: Cross multiply
    85,936.20x = 128,904.30 × 84,769.80
  4. Step 4: Simplify right side
    85,936.20x = 10,927,191,730.14
  5. Step 5: Solve for x
    x = 10,927,191,730.14/85,936.20
  6. Step 6: Final answer
    x = 127,154.70

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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.