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Finding the Fourth Proportional to 85,838.40, 128,757.60 and 48,513.60

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Solution

The fourth proportional to 85,838.40, 128,757.60 and 48,513.60 is: 72,770.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,838.40 : 128,757.60 = 48,513.60 : x
  2. Step 2: Convert to fraction form
    85,838.40/128,757.60 = 48,513.60/x
  3. Step 3: Cross multiply
    85,838.40x = 128,757.60 × 48,513.60
  4. Step 4: Simplify right side
    85,838.40x = 6,246,494,703.36
  5. Step 5: Solve for x
    x = 6,246,494,703.36/85,838.40
  6. Step 6: Final answer
    x = 72,770.40

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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.