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Finding the Fourth Proportional to 72,744.48, 100,567.80 and 72,080.28

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Solution

The fourth proportional to 72,744.48, 100,567.80 and 72,080.28 is: 99,649.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,744.48 : 100,567.80 = 72,080.28 : x
  2. Step 2: Convert to fraction form
    72,744.48/100,567.80 = 72,080.28/x
  3. Step 3: Cross multiply
    72,744.48x = 100,567.80 × 72,080.28
  4. Step 4: Simplify right side
    72,744.48x = 7,248,955,182.98
  5. Step 5: Solve for x
    x = 7,248,955,182.98/72,744.48
  6. Step 6: Final answer
    x = 99,649.56

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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.