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Finding the Fourth Proportional to 103,005.60, 154,362.60 and 90,466.80

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Solution

The fourth proportional to 103,005.60, 154,362.60 and 90,466.80 is: 135,572.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,005.60 : 154,362.60 = 90,466.80 : x
  2. Step 2: Convert to fraction form
    103,005.60/154,362.60 = 90,466.80/x
  3. Step 3: Cross multiply
    103,005.60x = 154,362.60 × 90,466.80
  4. Step 4: Simplify right side
    103,005.60x = 13,964,690,461.68
  5. Step 5: Solve for x
    x = 13,964,690,461.68/103,005.60
  6. Step 6: Final answer
    x = 135,572.15

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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.