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Finding the Fourth Proportional to 78,897.16, 108,873.78 and 43,086.60

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Solution

The fourth proportional to 78,897.16, 108,873.78 and 43,086.60 is: 59,457.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.16 : 108,873.78 = 43,086.60 : x
  2. Step 2: Convert to fraction form
    78,897.16/108,873.78 = 43,086.60/x
  3. Step 3: Cross multiply
    78,897.16x = 108,873.78 × 43,086.60
  4. Step 4: Simplify right side
    78,897.16x = 4,691,001,009.35
  5. Step 5: Solve for x
    x = 4,691,001,009.35/78,897.16
  6. Step 6: Final answer
    x = 59,457.16

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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.