Home / 128,322.81-192,482.10-38,365.73

Finding the Fourth Proportional to 128,322.81, 192,482.10 and 38,365.73

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Solution

The fourth proportional to 128,322.81, 192,482.10 and 38,365.73 is: 57,547.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,322.81 : 192,482.10 = 38,365.73 : x
  2. Step 2: Convert to fraction form
    128,322.81/192,482.10 = 38,365.73/x
  3. Step 3: Cross multiply
    128,322.81x = 192,482.10 × 38,365.73
  4. Step 4: Simplify right side
    128,322.81x = 7,384,716,278.43
  5. Step 5: Solve for x
    x = 7,384,716,278.43/128,322.81
  6. Step 6: Final answer
    x = 57,547.96

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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.