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Finding the Fourth Proportional to 103,805.40, 155,708.10 and 98,621.40

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Solution

The fourth proportional to 103,805.40, 155,708.10 and 98,621.40 is: 147,932.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,805.40 : 155,708.10 = 98,621.40 : x
  2. Step 2: Convert to fraction form
    103,805.40/155,708.10 = 98,621.40/x
  3. Step 3: Cross multiply
    103,805.40x = 155,708.10 × 98,621.40
  4. Step 4: Simplify right side
    103,805.40x = 15,356,150,813.34
  5. Step 5: Solve for x
    x = 15,356,150,813.34/103,805.40
  6. Step 6: Final answer
    x = 147,932.10

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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.