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Finding the Fourth Proportional to 72,513.60, 100,170.72 and 55,959.36

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Solution

The fourth proportional to 72,513.60, 100,170.72 and 55,959.36 is: 77,302.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,513.60 : 100,170.72 = 55,959.36 : x
  2. Step 2: Convert to fraction form
    72,513.60/100,170.72 = 55,959.36/x
  3. Step 3: Cross multiply
    72,513.60x = 100,170.72 × 55,959.36
  4. Step 4: Simplify right side
    72,513.60x = 5,605,489,381.94
  5. Step 5: Solve for x
    x = 5,605,489,381.94/72,513.60
  6. Step 6: Final answer
    x = 77,302.59

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1.5x scale

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.