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Finding the Fourth Proportional to 132,988.80, 199,316.88 and 66,447.60

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Solution

The fourth proportional to 132,988.80, 199,316.88 and 66,447.60 is: 99,588.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,988.80 : 199,316.88 = 66,447.60 : x
  2. Step 2: Convert to fraction form
    132,988.80/199,316.88 = 66,447.60/x
  3. Step 3: Cross multiply
    132,988.80x = 199,316.88 × 66,447.60
  4. Step 4: Simplify right side
    132,988.80x = 13,244,128,315.49
  5. Step 5: Solve for x
    x = 13,244,128,315.49/132,988.80
  6. Step 6: Final answer
    x = 99,588.30

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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.