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Finding the Fourth Proportional to 85,458.66, 128,141.01 and 26,277.90

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Solution

The fourth proportional to 85,458.66, 128,141.01 and 26,277.90 is: 39,402.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,458.66 : 128,141.01 = 26,277.90 : x
  2. Step 2: Convert to fraction form
    85,458.66/128,141.01 = 26,277.90/x
  3. Step 3: Cross multiply
    85,458.66x = 128,141.01 × 26,277.90
  4. Step 4: Simplify right side
    85,458.66x = 3,367,276,646.68
  5. Step 5: Solve for x
    x = 3,367,276,646.68/85,458.66
  6. Step 6: Final answer
    x = 39,402.40

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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.