Home / 81,678.37-112,707.75-45,868.09

Finding the Fourth Proportional to 81,678.37, 112,707.75 and 45,868.09

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Solution

The fourth proportional to 81,678.37, 112,707.75 and 45,868.09 is: 63,293.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678.37 : 112,707.75 = 45,868.09 : x
  2. Step 2: Convert to fraction form
    81,678.37/112,707.75 = 45,868.09/x
  3. Step 3: Cross multiply
    81,678.37x = 112,707.75 × 45,868.09
  4. Step 4: Simplify right side
    81,678.37x = 5,169,689,220.70
  5. Step 5: Solve for x
    x = 5,169,689,220.70/81,678.37
  6. Step 6: Final answer
    x = 63,293.25

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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.