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Finding the Fourth Proportional to 72,291.82, 99,790.32 and 64,724.80

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Solution

The fourth proportional to 72,291.82, 99,790.32 and 64,724.80 is: 89,344.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291.82 : 99,790.32 = 64,724.80 : x
  2. Step 2: Convert to fraction form
    72,291.82/99,790.32 = 64,724.80/x
  3. Step 3: Cross multiply
    72,291.82x = 99,790.32 × 64,724.80
  4. Step 4: Simplify right side
    72,291.82x = 6,458,908,503.94
  5. Step 5: Solve for x
    x = 6,458,908,503.94/72,291.82
  6. Step 6: Final answer
    x = 89,344.94

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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.