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Finding the Fourth Proportional to 85,756.80, 128,358.72 and 44,146.56

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Solution

The fourth proportional to 85,756.80, 128,358.72 and 44,146.56 is: 66,077.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,756.80 : 128,358.72 = 44,146.56 : x
  2. Step 2: Convert to fraction form
    85,756.80/128,358.72 = 44,146.56/x
  3. Step 3: Cross multiply
    85,756.80x = 128,358.72 × 44,146.56
  4. Step 4: Simplify right side
    85,756.80x = 5,666,595,934.00
  5. Step 5: Solve for x
    x = 5,666,595,934.00/85,756.80
  6. Step 6: Final answer
    x = 66,077.51

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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.