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Finding the Fourth Proportional to 128,140.60, 192,210.90 and 57,063.10

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Solution

The fourth proportional to 128,140.60, 192,210.90 and 57,063.10 is: 85,594.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,140.60 : 192,210.90 = 57,063.10 : x
  2. Step 2: Convert to fraction form
    128,140.60/192,210.90 = 57,063.10/x
  3. Step 3: Cross multiply
    128,140.60x = 192,210.90 × 57,063.10
  4. Step 4: Simplify right side
    128,140.60x = 10,968,149,807.79
  5. Step 5: Solve for x
    x = 10,968,149,807.79/128,140.60
  6. Step 6: Final answer
    x = 85,594.65

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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.