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Finding the Fourth Proportional to 99,570.80, 149,382.60 and 43,386.80

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Solution

The fourth proportional to 99,570.80, 149,382.60 and 43,386.80 is: 65,091.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,570.80 : 149,382.60 = 43,386.80 : x
  2. Step 2: Convert to fraction form
    99,570.80/149,382.60 = 43,386.80/x
  3. Step 3: Cross multiply
    99,570.80x = 149,382.60 × 43,386.80
  4. Step 4: Simplify right side
    99,570.80x = 6,481,232,989.68
  5. Step 5: Solve for x
    x = 6,481,232,989.68/99,570.80
  6. Step 6: Final answer
    x = 65,091.70

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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.