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Finding the Fourth Proportional to 72,171.64, 99,596.58 and 40,340.53

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Solution

The fourth proportional to 72,171.64, 99,596.58 and 40,340.53 is: 55,669.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,171.64 : 99,596.58 = 40,340.53 : x
  2. Step 2: Convert to fraction form
    72,171.64/99,596.58 = 40,340.53/x
  3. Step 3: Cross multiply
    72,171.64x = 99,596.58 × 40,340.53
  4. Step 4: Simplify right side
    72,171.64x = 4,017,778,823.39
  5. Step 5: Solve for x
    x = 4,017,778,823.39/72,171.64
  6. Step 6: Final answer
    x = 55,669.77

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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.