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Finding the Fourth Proportional to 103,672.15, 155,509.10 and 28,798.13

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Solution

The fourth proportional to 103,672.15, 155,509.10 and 28,798.13 is: 43,197.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,672.15 : 155,509.10 = 28,798.13 : x
  2. Step 2: Convert to fraction form
    103,672.15/155,509.10 = 28,798.13/x
  3. Step 3: Cross multiply
    103,672.15x = 155,509.10 × 28,798.13
  4. Step 4: Simplify right side
    103,672.15x = 4,478,371,277.98
  5. Step 5: Solve for x
    x = 4,478,371,277.98/103,672.15
  6. Step 6: Final answer
    x = 43,197.44

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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.