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Finding the Fourth Proportional to 75,280.63, 103,879.78 and 43,459.78

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Solution

The fourth proportional to 75,280.63, 103,879.78 and 43,459.78 is: 59,970.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,280.63 : 103,879.78 = 43,459.78 : x
  2. Step 2: Convert to fraction form
    75,280.63/103,879.78 = 43,459.78/x
  3. Step 3: Cross multiply
    75,280.63x = 103,879.78 × 43,459.78
  4. Step 4: Simplify right side
    75,280.63x = 4,514,592,385.25
  5. Step 5: Solve for x
    x = 4,514,592,385.25/75,280.63
  6. Step 6: Final answer
    x = 59,970.17

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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.