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Finding the Fourth Proportional to 99,559.80, 149,570.10 and 68,455.80

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Solution

The fourth proportional to 99,559.80, 149,570.10 and 68,455.80 is: 102,842.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,559.80 : 149,570.10 = 68,455.80 : x
  2. Step 2: Convert to fraction form
    99,559.80/149,570.10 = 68,455.80/x
  3. Step 3: Cross multiply
    99,559.80x = 149,570.10 × 68,455.80
  4. Step 4: Simplify right side
    99,559.80x = 10,238,940,851.58
  5. Step 5: Solve for x
    x = 10,238,940,851.58/99,559.80
  6. Step 6: Final answer
    x = 102,842.12

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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.