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Finding the Fourth Proportional to 72,364.91, 99,862.40 and 40,533.71

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Solution

The fourth proportional to 72,364.91, 99,862.40 and 40,533.71 is: 55,935.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,364.91 : 99,862.40 = 40,533.71 : x
  2. Step 2: Convert to fraction form
    72,364.91/99,862.40 = 40,533.71/x
  3. Step 3: Cross multiply
    72,364.91x = 99,862.40 × 40,533.71
  4. Step 4: Simplify right side
    72,364.91x = 4,047,793,163.53
  5. Step 5: Solve for x
    x = 4,047,793,163.53/72,364.91
  6. Step 6: Final answer
    x = 55,935.86

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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.