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Finding the Fourth Proportional to 103,433.40, 155,150.10 and 77,189.40

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Solution

The fourth proportional to 103,433.40, 155,150.10 and 77,189.40 is: 115,784.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,433.40 : 155,150.10 = 77,189.40 : x
  2. Step 2: Convert to fraction form
    103,433.40/155,150.10 = 77,189.40/x
  3. Step 3: Cross multiply
    103,433.40x = 155,150.10 × 77,189.40
  4. Step 4: Simplify right side
    103,433.40x = 11,975,943,128.94
  5. Step 5: Solve for x
    x = 11,975,943,128.94/103,433.40
  6. Step 6: Final answer
    x = 115,784.10

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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.