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Finding the Fourth Proportional to 72,916.59, 100,624.86 and 39,382.59

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Solution

The fourth proportional to 72,916.59, 100,624.86 and 39,382.59 is: 54,347.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,916.59 : 100,624.86 = 39,382.59 : x
  2. Step 2: Convert to fraction form
    72,916.59/100,624.86 = 39,382.59/x
  3. Step 3: Cross multiply
    72,916.59x = 100,624.86 × 39,382.59
  4. Step 4: Simplify right side
    72,916.59x = 3,962,867,605.19
  5. Step 5: Solve for x
    x = 3,962,867,605.19/72,916.59
  6. Step 6: Final answer
    x = 54,347.96

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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.