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Finding the Fourth Proportional to 103,130.20, 154,695.30 and 90,664.30

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Solution

The fourth proportional to 103,130.20, 154,695.30 and 90,664.30 is: 135,996.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,130.20 : 154,695.30 = 90,664.30 : x
  2. Step 2: Convert to fraction form
    103,130.20/154,695.30 = 90,664.30/x
  3. Step 3: Cross multiply
    103,130.20x = 154,695.30 × 90,664.30
  4. Step 4: Simplify right side
    103,130.20x = 14,025,341,087.79
  5. Step 5: Solve for x
    x = 14,025,341,087.79/103,130.20
  6. Step 6: Final answer
    x = 135,996.45

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1.5x scale

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.