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Finding the Fourth Proportional to 85,890.84, 128,850.05 and 26,740.18

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Solution

The fourth proportional to 85,890.84, 128,850.05 and 26,740.18 is: 40,114.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890.84 : 128,850.05 = 26,740.18 : x
  2. Step 2: Convert to fraction form
    85,890.84/128,850.05 = 26,740.18/x
  3. Step 3: Cross multiply
    85,890.84x = 128,850.05 × 26,740.18
  4. Step 4: Simplify right side
    85,890.84x = 3,445,473,530.01
  5. Step 5: Solve for x
    x = 3,445,473,530.01/85,890.84
  6. Step 6: Final answer
    x = 40,114.56

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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.