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Finding the Fourth Proportional to 98,858.80, 148,288.20 and 81,144.10

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Solution

The fourth proportional to 98,858.80, 148,288.20 and 81,144.10 is: 121,716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,858.80 : 148,288.20 = 81,144.10 : x
  2. Step 2: Convert to fraction form
    98,858.80/148,288.20 = 81,144.10/x
  3. Step 3: Cross multiply
    98,858.80x = 148,288.20 × 81,144.10
  4. Step 4: Simplify right side
    98,858.80x = 12,032,712,529.62
  5. Step 5: Solve for x
    x = 12,032,712,529.62/98,858.80
  6. Step 6: Final answer
    x = 121,716.15

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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.