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Finding the Fourth Proportional to 235,428.40, 353,142.60 and 85,837.60

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Solution

The fourth proportional to 235,428.40, 353,142.60 and 85,837.60 is: 128,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,428.40 : 353,142.60 = 85,837.60 : x
  2. Step 2: Convert to fraction form
    235,428.40/353,142.60 = 85,837.60/x
  3. Step 3: Cross multiply
    235,428.40x = 353,142.60 × 85,837.60
  4. Step 4: Simplify right side
    235,428.40x = 30,312,913,241.76
  5. Step 5: Solve for x
    x = 30,312,913,241.76/235,428.40
  6. Step 6: Final answer
    x = 128,756.40

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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.