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Finding the Fourth Proportional to 84,005.42, 115,925.31 and 45,763.90

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Solution

The fourth proportional to 84,005.42, 115,925.31 and 45,763.90 is: 63,153.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,005.42 : 115,925.31 = 45,763.90 : x
  2. Step 2: Convert to fraction form
    84,005.42/115,925.31 = 45,763.90/x
  3. Step 3: Cross multiply
    84,005.42x = 115,925.31 × 45,763.90
  4. Step 4: Simplify right side
    84,005.42x = 5,305,194,004.50
  5. Step 5: Solve for x
    x = 5,305,194,004.50/84,005.42
  6. Step 6: Final answer
    x = 63,153.00

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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.