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Finding the Fourth Proportional to 72,295.87, 99,768.28 and 40,464.78

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Solution

The fourth proportional to 72,295.87, 99,768.28 and 40,464.78 is: 55,841.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,295.87 : 99,768.28 = 40,464.78 : x
  2. Step 2: Convert to fraction form
    72,295.87/99,768.28 = 40,464.78/x
  3. Step 3: Cross multiply
    72,295.87x = 99,768.28 × 40,464.78
  4. Step 4: Simplify right side
    72,295.87x = 4,037,101,501.18
  5. Step 5: Solve for x
    x = 4,037,101,501.18/72,295.87
  6. Step 6: Final answer
    x = 55,841.38

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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.