Home / 85,845.52-128,776.64-26,665.28

Finding the Fourth Proportional to 85,845.52, 128,776.64 and 26,665.28

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Solution

The fourth proportional to 85,845.52, 128,776.64 and 26,665.28 is: 40,000.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.52 : 128,776.64 = 26,665.28 : x
  2. Step 2: Convert to fraction form
    85,845.52/128,776.64 = 26,665.28/x
  3. Step 3: Cross multiply
    85,845.52x = 128,776.64 × 26,665.28
  4. Step 4: Simplify right side
    85,845.52x = 3,433,865,163.06
  5. Step 5: Solve for x
    x = 3,433,865,163.06/85,845.52
  6. Step 6: Final answer
    x = 40,000.52

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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.