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Finding the Fourth Proportional to 98,028.80, 146,870.40 and 80,403.20

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Solution

The fourth proportional to 98,028.80, 146,870.40 and 80,403.20 is: 120,463.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,028.80 : 146,870.40 = 80,403.20 : x
  2. Step 2: Convert to fraction form
    98,028.80/146,870.40 = 80,403.20/x
  3. Step 3: Cross multiply
    98,028.80x = 146,870.40 × 80,403.20
  4. Step 4: Simplify right side
    98,028.80x = 11,808,850,145.28
  5. Step 5: Solve for x
    x = 11,808,850,145.28/98,028.80
  6. Step 6: Final answer
    x = 120,463.07

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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.