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Finding the Fourth Proportional to 85,654.68, 128,497.68 and 26,486.34

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Solution

The fourth proportional to 85,654.68, 128,497.68 and 26,486.34 is: 39,734.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,654.68 : 128,497.68 = 26,486.34 : x
  2. Step 2: Convert to fraction form
    85,654.68/128,497.68 = 26,486.34/x
  3. Step 3: Cross multiply
    85,654.68x = 128,497.68 × 26,486.34
  4. Step 4: Simplify right side
    85,654.68x = 3,403,433,241.69
  5. Step 5: Solve for x
    x = 3,403,433,241.69/85,654.68
  6. Step 6: Final answer
    x = 39,734.35

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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.