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Finding the Fourth Proportional to 81,678.85, 112,710.39 and 45,861.93

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Solution

The fourth proportional to 81,678.85, 112,710.39 and 45,861.93 is: 63,285.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678.85 : 112,710.39 = 45,861.93 : x
  2. Step 2: Convert to fraction form
    81,678.85/112,710.39 = 45,861.93/x
  3. Step 3: Cross multiply
    81,678.85x = 112,710.39 × 45,861.93
  4. Step 4: Simplify right side
    81,678.85x = 5,169,115,844.47
  5. Step 5: Solve for x
    x = 5,169,115,844.47/81,678.85
  6. Step 6: Final answer
    x = 63,285.86

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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.