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Finding the Fourth Proportional to 103,156.90, 154,718.74 and 28,259.54

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Solution

The fourth proportional to 103,156.90, 154,718.74 and 28,259.54 is: 42,384.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,156.90 : 154,718.74 = 28,259.54 : x
  2. Step 2: Convert to fraction form
    103,156.90/154,718.74 = 28,259.54/x
  3. Step 3: Cross multiply
    103,156.90x = 154,718.74 × 28,259.54
  4. Step 4: Simplify right side
    103,156.90x = 4,372,280,421.78
  5. Step 5: Solve for x
    x = 4,372,280,421.78/103,156.90
  6. Step 6: Final answer
    x = 42,384.76

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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.