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Finding the Fourth Proportional to 103,638.55, 154,649.52 and 92,468.45

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Solution

The fourth proportional to 103,638.55, 154,649.52 and 92,468.45 is: 137,981.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.55 : 154,649.52 = 92,468.45 : x
  2. Step 2: Convert to fraction form
    103,638.55/154,649.52 = 92,468.45/x
  3. Step 3: Cross multiply
    103,638.55x = 154,649.52 × 92,468.45
  4. Step 4: Simplify right side
    103,638.55x = 14,300,201,407.64
  5. Step 5: Solve for x
    x = 14,300,201,407.64/103,638.55
  6. Step 6: Final answer
    x = 137,981.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.