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Finding the Fourth Proportional to 78,897.74, 108,879.74 and 43,088.80

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Solution

The fourth proportional to 78,897.74, 108,879.74 and 43,088.80 is: 59,463.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.74 : 108,879.74 = 43,088.80 : x
  2. Step 2: Convert to fraction form
    78,897.74/108,879.74 = 43,088.80/x
  3. Step 3: Cross multiply
    78,897.74x = 108,879.74 × 43,088.80
  4. Step 4: Simplify right side
    78,897.74x = 4,691,497,340.91
  5. Step 5: Solve for x
    x = 4,691,497,340.91/78,897.74
  6. Step 6: Final answer
    x = 59,463.01

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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.