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Finding the Fourth Proportional to 78,705.64, 108,606.18 and 45,165.16

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Solution

The fourth proportional to 78,705.64, 108,606.18 and 45,165.16 is: 62,323.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,705.64 : 108,606.18 = 45,165.16 : x
  2. Step 2: Convert to fraction form
    78,705.64/108,606.18 = 45,165.16/x
  3. Step 3: Cross multiply
    78,705.64x = 108,606.18 × 45,165.16
  4. Step 4: Simplify right side
    78,705.64x = 4,905,215,496.69
  5. Step 5: Solve for x
    x = 4,905,215,496.69/78,705.64
  6. Step 6: Final answer
    x = 62,323.56

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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.