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Finding the Fourth Proportional to 72,636.77, 100,248.08 and 40,805.70

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Solution

The fourth proportional to 72,636.77, 100,248.08 and 40,805.70 is: 56,317.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,636.77 : 100,248.08 = 40,805.70 : x
  2. Step 2: Convert to fraction form
    72,636.77/100,248.08 = 40,805.70/x
  3. Step 3: Cross multiply
    72,636.77x = 100,248.08 × 40,805.70
  4. Step 4: Simplify right side
    72,636.77x = 4,090,692,874.03
  5. Step 5: Solve for x
    x = 4,090,692,874.03/72,636.77
  6. Step 6: Final answer
    x = 56,317.11

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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.