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Finding the Fourth Proportional to 72,290.82, 99,788.94 and 64,723.80

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Solution

The fourth proportional to 72,290.82, 99,788.94 and 64,723.80 is: 89,343.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,290.82 : 99,788.94 = 64,723.80 : x
  2. Step 2: Convert to fraction form
    72,290.82/99,788.94 = 64,723.80/x
  3. Step 3: Cross multiply
    72,290.82x = 99,788.94 × 64,723.80
  4. Step 4: Simplify right side
    72,290.82x = 6,458,719,394.77
  5. Step 5: Solve for x
    x = 6,458,719,394.77/72,290.82
  6. Step 6: Final answer
    x = 89,343.56

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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.