Home / 128,606.80-193,124.28-86,756.24

Finding the Fourth Proportional to 128,606.80, 193,124.28 and 86,756.24

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Solution

The fourth proportional to 128,606.80, 193,124.28 and 86,756.24 is: 130,278.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,606.80 : 193,124.28 = 86,756.24 : x
  2. Step 2: Convert to fraction form
    128,606.80/193,124.28 = 86,756.24/x
  3. Step 3: Cross multiply
    128,606.80x = 193,124.28 × 86,756.24
  4. Step 4: Simplify right side
    128,606.80x = 16,754,736,385.51
  5. Step 5: Solve for x
    x = 16,754,736,385.51/128,606.80
  6. Step 6: Final answer
    x = 130,278.78

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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.