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Finding the Fourth Proportional to 72,176.77, 99,609.35 and 40,343.77

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Solution

The fourth proportional to 72,176.77, 99,609.35 and 40,343.77 is: 55,677.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,176.77 : 99,609.35 = 40,343.77 : x
  2. Step 2: Convert to fraction form
    72,176.77/99,609.35 = 40,343.77/x
  3. Step 3: Cross multiply
    72,176.77x = 99,609.35 × 40,343.77
  4. Step 4: Simplify right side
    72,176.77x = 4,018,616,629.04
  5. Step 5: Solve for x
    x = 4,018,616,629.04/72,176.77
  6. Step 6: Final answer
    x = 55,677.42

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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.