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Finding the Fourth Proportional to 103,428.80, 155,143.20 and 96,047.68

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Solution

The fourth proportional to 103,428.80, 155,143.20 and 96,047.68 is: 144,071.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,428.80 : 155,143.20 = 96,047.68 : x
  2. Step 2: Convert to fraction form
    103,428.80/155,143.20 = 96,047.68/x
  3. Step 3: Cross multiply
    103,428.80x = 155,143.20 × 96,047.68
  4. Step 4: Simplify right side
    103,428.80x = 14,901,144,427.78
  5. Step 5: Solve for x
    x = 14,901,144,427.78/103,428.80
  6. Step 6: Final answer
    x = 144,071.52

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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.