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Finding the Fourth Proportional to 103,618.62, 155,427.95 and 28,738.77

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Solution

The fourth proportional to 103,618.62, 155,427.95 and 28,738.77 is: 43,108.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,618.62 : 155,427.95 = 28,738.77 : x
  2. Step 2: Convert to fraction form
    103,618.62/155,427.95 = 28,738.77/x
  3. Step 3: Cross multiply
    103,618.62x = 155,427.95 × 28,738.77
  4. Step 4: Simplify right side
    103,618.62x = 4,466,808,106.62
  5. Step 5: Solve for x
    x = 4,466,808,106.62/103,618.62
  6. Step 6: Final answer
    x = 43,108.16

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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.