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Finding the Fourth Proportional to 81,457.71, 112,416.30 and 45,659.28

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Solution

The fourth proportional to 81,457.71, 112,416.30 and 45,659.28 is: 63,012.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,457.71 : 112,416.30 = 45,659.28 : x
  2. Step 2: Convert to fraction form
    81,457.71/112,416.30 = 45,659.28/x
  3. Step 3: Cross multiply
    81,457.71x = 112,416.30 × 45,659.28
  4. Step 4: Simplify right side
    81,457.71x = 5,132,847,318.26
  5. Step 5: Solve for x
    x = 5,132,847,318.26/81,457.71
  6. Step 6: Final answer
    x = 63,012.42

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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.