Home / 85,519.10-128,278.65-54,026.30

Finding the Fourth Proportional to 85,519.10, 128,278.65 and 54,026.30

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Solution

The fourth proportional to 85,519.10, 128,278.65 and 54,026.30 is: 81,039.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,519.10 : 128,278.65 = 54,026.30 : x
  2. Step 2: Convert to fraction form
    85,519.10/128,278.65 = 54,026.30/x
  3. Step 3: Cross multiply
    85,519.10x = 128,278.65 × 54,026.30
  4. Step 4: Simplify right side
    85,519.10x = 6,930,420,828.50
  5. Step 5: Solve for x
    x = 6,930,420,828.50/85,519.10
  6. Step 6: Final answer
    x = 81,039.45

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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.