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Finding the Fourth Proportional to 85,855.08, 128,800.86 and 26,689.32

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Solution

The fourth proportional to 85,855.08, 128,800.86 and 26,689.32 is: 40,039.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,855.08 : 128,800.86 = 26,689.32 : x
  2. Step 2: Convert to fraction form
    85,855.08/128,800.86 = 26,689.32/x
  3. Step 3: Cross multiply
    85,855.08x = 128,800.86 × 26,689.32
  4. Step 4: Simplify right side
    85,855.08x = 3,437,607,368.82
  5. Step 5: Solve for x
    x = 3,437,607,368.82/85,855.08
  6. Step 6: Final answer
    x = 40,039.65

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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.