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Finding the Fourth Proportional to 81,116.10, 111,939.03 and 45,306.63

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Solution

The fourth proportional to 81,116.10, 111,939.03 and 45,306.63 is: 62,522.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,116.10 : 111,939.03 = 45,306.63 : x
  2. Step 2: Convert to fraction form
    81,116.10/111,939.03 = 45,306.63/x
  3. Step 3: Cross multiply
    81,116.10x = 111,939.03 × 45,306.63
  4. Step 4: Simplify right side
    81,116.10x = 5,071,580,214.77
  5. Step 5: Solve for x
    x = 5,071,580,214.77/81,116.10
  6. Step 6: Final answer
    x = 62,522.49

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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.