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Finding the Fourth Proportional to 103,422.30, 155,133.45 and 98,610.90

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Solution

The fourth proportional to 103,422.30, 155,133.45 and 98,610.90 is: 147,916.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,422.30 : 155,133.45 = 98,610.90 : x
  2. Step 2: Convert to fraction form
    103,422.30/155,133.45 = 98,610.90/x
  3. Step 3: Cross multiply
    103,422.30x = 155,133.45 × 98,610.90
  4. Step 4: Simplify right side
    103,422.30x = 15,297,849,124.61
  5. Step 5: Solve for x
    x = 15,297,849,124.61/103,422.30
  6. Step 6: Final answer
    x = 147,916.35

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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.