Home / 128,217.60-192,326.40-57,140.10

Finding the Fourth Proportional to 128,217.60, 192,326.40 and 57,140.10

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Solution

The fourth proportional to 128,217.60, 192,326.40 and 57,140.10 is: 85,710.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,217.60 : 192,326.40 = 57,140.10 : x
  2. Step 2: Convert to fraction form
    128,217.60/192,326.40 = 57,140.10/x
  3. Step 3: Cross multiply
    128,217.60x = 192,326.40 × 57,140.10
  4. Step 4: Simplify right side
    128,217.60x = 10,989,549,728.64
  5. Step 5: Solve for x
    x = 10,989,549,728.64/128,217.60
  6. Step 6: Final answer
    x = 85,710.15

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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.