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Finding the Fourth Proportional to 103,473.40, 155,210.10 and 90,351.40

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Solution

The fourth proportional to 103,473.40, 155,210.10 and 90,351.40 is: 135,527.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,473.40 : 155,210.10 = 90,351.40 : x
  2. Step 2: Convert to fraction form
    103,473.40/155,210.10 = 90,351.40/x
  3. Step 3: Cross multiply
    103,473.40x = 155,210.10 × 90,351.40
  4. Step 4: Simplify right side
    103,473.40x = 14,023,449,829.14
  5. Step 5: Solve for x
    x = 14,023,449,829.14/103,473.40
  6. Step 6: Final answer
    x = 135,527.10

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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.