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Finding the Fourth Proportional to 72,975.93, 109,420.02 and 28,549.77

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Solution

The fourth proportional to 72,975.93, 109,420.02 and 28,549.77 is: 42,807.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,975.93 : 109,420.02 = 28,549.77 : x
  2. Step 2: Convert to fraction form
    72,975.93/109,420.02 = 28,549.77/x
  3. Step 3: Cross multiply
    72,975.93x = 109,420.02 × 28,549.77
  4. Step 4: Simplify right side
    72,975.93x = 3,123,916,404.40
  5. Step 5: Solve for x
    x = 3,123,916,404.40/72,975.93
  6. Step 6: Final answer
    x = 42,807.49

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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.