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Finding the Fourth Proportional to 99,865.80, 149,798.70 and 66,477.60

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Solution

The fourth proportional to 99,865.80, 149,798.70 and 66,477.60 is: 99,716.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,865.80 : 149,798.70 = 66,477.60 : x
  2. Step 2: Convert to fraction form
    99,865.80/149,798.70 = 66,477.60/x
  3. Step 3: Cross multiply
    99,865.80x = 149,798.70 × 66,477.60
  4. Step 4: Simplify right side
    99,865.80x = 9,958,258,059.12
  5. Step 5: Solve for x
    x = 9,958,258,059.12/99,865.80
  6. Step 6: Final answer
    x = 99,716.40

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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.