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Finding the Fourth Proportional to 135,578.40, 203,425.20 and 65,421.60

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Solution

The fourth proportional to 135,578.40, 203,425.20 and 65,421.60 is: 98,160.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,578.40 : 203,425.20 = 65,421.60 : x
  2. Step 2: Convert to fraction form
    135,578.40/203,425.20 = 65,421.60/x
  3. Step 3: Cross multiply
    135,578.40x = 203,425.20 × 65,421.60
  4. Step 4: Simplify right side
    135,578.40x = 13,308,402,064.32
  5. Step 5: Solve for x
    x = 13,308,402,064.32/135,578.40
  6. Step 6: Final answer
    x = 98,160.19

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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.