Home / 128,931.87-193,407.12-53,976.63

Finding the Fourth Proportional to 128,931.87, 193,407.12 and 53,976.63

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Solution

The fourth proportional to 128,931.87, 193,407.12 and 53,976.63 is: 80,968.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,931.87 : 193,407.12 = 53,976.63 : x
  2. Step 2: Convert to fraction form
    128,931.87/193,407.12 = 53,976.63/x
  3. Step 3: Cross multiply
    128,931.87x = 193,407.12 × 53,976.63
  4. Step 4: Simplify right side
    128,931.87x = 10,439,464,555.61
  5. Step 5: Solve for x
    x = 10,439,464,555.61/128,931.87
  6. Step 6: Final answer
    x = 80,968.84

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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.