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Finding the Fourth Proportional to 85,135.34, 127,674.15 and 28,960.43

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Solution

The fourth proportional to 85,135.34, 127,674.15 and 28,960.43 is: 43,430.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,135.34 : 127,674.15 = 28,960.43 : x
  2. Step 2: Convert to fraction form
    85,135.34/127,674.15 = 28,960.43/x
  3. Step 3: Cross multiply
    85,135.34x = 127,674.15 × 28,960.43
  4. Step 4: Simplify right side
    85,135.34x = 3,697,497,645.51
  5. Step 5: Solve for x
    x = 3,697,497,645.51/85,135.34
  6. Step 6: Final answer
    x = 43,430.82

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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.