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Finding the Fourth Proportional to 73,041.68, 109,513.08 and 28,640.72

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Solution

The fourth proportional to 73,041.68, 109,513.08 and 28,640.72 is: 42,941.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,041.68 : 109,513.08 = 28,640.72 : x
  2. Step 2: Convert to fraction form
    73,041.68/109,513.08 = 28,640.72/x
  3. Step 3: Cross multiply
    73,041.68x = 109,513.08 × 28,640.72
  4. Step 4: Simplify right side
    73,041.68x = 3,136,533,460.62
  5. Step 5: Solve for x
    x = 3,136,533,460.62/73,041.68
  6. Step 6: Final answer
    x = 42,941.69

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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.