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Finding the Fourth Proportional to 72,256.80, 99,748.47 and 54,358.63

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Solution

The fourth proportional to 72,256.80, 99,748.47 and 54,358.63 is: 75,040.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,256.80 : 99,748.47 = 54,358.63 : x
  2. Step 2: Convert to fraction form
    72,256.80/99,748.47 = 54,358.63/x
  3. Step 3: Cross multiply
    72,256.80x = 99,748.47 × 54,358.63
  4. Step 4: Simplify right side
    72,256.80x = 5,422,190,173.80
  5. Step 5: Solve for x
    x = 5,422,190,173.80/72,256.80
  6. Step 6: Final answer
    x = 75,040.55

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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.