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Finding the Fourth Proportional to 102,988.94, 154,541.79 and 55,603.40

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Solution

The fourth proportional to 102,988.94, 154,541.79 and 55,603.40 is: 83,436.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,988.94 : 154,541.79 = 55,603.40 : x
  2. Step 2: Convert to fraction form
    102,988.94/154,541.79 = 55,603.40/x
  3. Step 3: Cross multiply
    102,988.94x = 154,541.79 × 55,603.40
  4. Step 4: Simplify right side
    102,988.94x = 8,593,048,193.38
  5. Step 5: Solve for x
    x = 8,593,048,193.38/102,988.94
  6. Step 6: Final answer
    x = 83,436.62

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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.