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Finding the Fourth Proportional to 98,860.80, 148,291.20 and 81,146.10

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Solution

The fourth proportional to 98,860.80, 148,291.20 and 81,146.10 is: 121,719.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,860.80 : 148,291.20 = 81,146.10 : x
  2. Step 2: Convert to fraction form
    98,860.80/148,291.20 = 81,146.10/x
  3. Step 3: Cross multiply
    98,860.80x = 148,291.20 × 81,146.10
  4. Step 4: Simplify right side
    98,860.80x = 12,033,252,544.32
  5. Step 5: Solve for x
    x = 12,033,252,544.32/98,860.80
  6. Step 6: Final answer
    x = 121,719.15

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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.