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Finding the Fourth Proportional to 84,005.76, 115,938.90 and 48,188.82

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Solution

The fourth proportional to 84,005.76, 115,938.90 and 48,188.82 is: 66,506.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,005.76 : 115,938.90 = 48,188.82 : x
  2. Step 2: Convert to fraction form
    84,005.76/115,938.90 = 48,188.82/x
  3. Step 3: Cross multiply
    84,005.76x = 115,938.90 × 48,188.82
  4. Step 4: Simplify right side
    84,005.76x = 5,586,958,783.10
  5. Step 5: Solve for x
    x = 5,586,958,783.10/84,005.76
  6. Step 6: Final answer
    x = 66,506.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.