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Finding the Fourth Proportional to 85,609.94, 128,421.08 and 26,437.95

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Solution

The fourth proportional to 85,609.94, 128,421.08 and 26,437.95 is: 39,658.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,609.94 : 128,421.08 = 26,437.95 : x
  2. Step 2: Convert to fraction form
    85,609.94/128,421.08 = 26,437.95/x
  3. Step 3: Cross multiply
    85,609.94x = 128,421.08 × 26,437.95
  4. Step 4: Simplify right side
    85,609.94x = 3,395,189,959.80
  5. Step 5: Solve for x
    x = 3,395,189,959.80/85,609.94
  6. Step 6: Final answer
    x = 39,658.83

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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.