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Finding the Fourth Proportional to 72,993.11, 100,711.43 and 42,762.18

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Solution

The fourth proportional to 72,993.11, 100,711.43 and 42,762.18 is: 59,000.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,993.11 : 100,711.43 = 42,762.18 : x
  2. Step 2: Convert to fraction form
    72,993.11/100,711.43 = 42,762.18/x
  3. Step 3: Cross multiply
    72,993.11x = 100,711.43 × 42,762.18
  4. Step 4: Simplify right side
    72,993.11x = 4,306,639,935.16
  5. Step 5: Solve for x
    x = 4,306,639,935.16/72,993.11
  6. Step 6: Final answer
    x = 59,000.64

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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.