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Finding the Fourth Proportional to 100,010.40, 149,900.40 and 40,816.80

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Solution

The fourth proportional to 100,010.40, 149,900.40 and 40,816.80 is: 61,178.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,010.40 : 149,900.40 = 40,816.80 : x
  2. Step 2: Convert to fraction form
    100,010.40/149,900.40 = 40,816.80/x
  3. Step 3: Cross multiply
    100,010.40x = 149,900.40 × 40,816.80
  4. Step 4: Simplify right side
    100,010.40x = 6,118,454,646.72
  5. Step 5: Solve for x
    x = 6,118,454,646.72/100,010.40
  6. Step 6: Final answer
    x = 61,178.18

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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.