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Finding the Fourth Proportional to 117,457.12, 162,090.92 and 63,742.12

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Solution

The fourth proportional to 117,457.12, 162,090.92 and 63,742.12 is: 87,964.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,457.12 : 162,090.92 = 63,742.12 : x
  2. Step 2: Convert to fraction form
    117,457.12/162,090.92 = 63,742.12/x
  3. Step 3: Cross multiply
    117,457.12x = 162,090.92 × 63,742.12
  4. Step 4: Simplify right side
    117,457.12x = 10,332,018,873.55
  5. Step 5: Solve for x
    x = 10,332,018,873.55/117,457.12
  6. Step 6: Final answer
    x = 87,964.18

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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.