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Finding the Fourth Proportional to 103,422.90, 155,134.35 and 36,938.10

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Solution

The fourth proportional to 103,422.90, 155,134.35 and 36,938.10 is: 55,407.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,422.90 : 155,134.35 = 36,938.10 : x
  2. Step 2: Convert to fraction form
    103,422.90/155,134.35 = 36,938.10/x
  3. Step 3: Cross multiply
    103,422.90x = 155,134.35 × 36,938.10
  4. Step 4: Simplify right side
    103,422.90x = 5,730,368,133.74
  5. Step 5: Solve for x
    x = 5,730,368,133.74/103,422.90
  6. Step 6: Final answer
    x = 55,407.15

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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.