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Finding the Fourth Proportional to 72,269.58, 99,736.20 and 40,438.20

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Solution

The fourth proportional to 72,269.58, 99,736.20 and 40,438.20 is: 55,807.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,269.58 : 99,736.20 = 40,438.20 : x
  2. Step 2: Convert to fraction form
    72,269.58/99,736.20 = 40,438.20/x
  3. Step 3: Cross multiply
    72,269.58x = 99,736.20 × 40,438.20
  4. Step 4: Simplify right side
    72,269.58x = 4,033,152,402.84
  5. Step 5: Solve for x
    x = 4,033,152,402.84/72,269.58
  6. Step 6: Final answer
    x = 55,807.05

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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.