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Finding the Fourth Proportional to 72,506.68, 108,631.38 and 30,293.93

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Solution

The fourth proportional to 72,506.68, 108,631.38 and 30,293.93 is: 45,387.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,506.68 : 108,631.38 = 30,293.93 : x
  2. Step 2: Convert to fraction form
    72,506.68/108,631.38 = 30,293.93/x
  3. Step 3: Cross multiply
    72,506.68x = 108,631.38 × 30,293.93
  4. Step 4: Simplify right side
    72,506.68x = 3,290,871,421.52
  5. Step 5: Solve for x
    x = 3,290,871,421.52/72,506.68
  6. Step 6: Final answer
    x = 45,387.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.