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Finding the Fourth Proportional to 78,962.64, 108,969.86 and 43,154.16

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Solution

The fourth proportional to 78,962.64, 108,969.86 and 43,154.16 is: 59,553.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,962.64 : 108,969.86 = 43,154.16 : x
  2. Step 2: Convert to fraction form
    78,962.64/108,969.86 = 43,154.16/x
  3. Step 3: Cross multiply
    78,962.64x = 108,969.86 × 43,154.16
  4. Step 4: Simplify right side
    78,962.64x = 4,702,502,773.62
  5. Step 5: Solve for x
    x = 4,702,502,773.62/78,962.64
  6. Step 6: Final answer
    x = 59,553.52

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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.