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Finding the Fourth Proportional to 81,802.40, 112,879.12 and 45,986.72

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Solution

The fourth proportional to 81,802.40, 112,879.12 and 45,986.72 is: 63,457.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,802.40 : 112,879.12 = 45,986.72 : x
  2. Step 2: Convert to fraction form
    81,802.40/112,879.12 = 45,986.72/x
  3. Step 3: Cross multiply
    81,802.40x = 112,879.12 × 45,986.72
  4. Step 4: Simplify right side
    81,802.40x = 5,190,940,485.29
  5. Step 5: Solve for x
    x = 5,190,940,485.29/81,802.40
  6. Step 6: Final answer
    x = 63,457.07

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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.