Home / 105,178.05-145,157.13-64,890.77

Finding the Fourth Proportional to 105,178.05, 145,157.13 and 64,890.77

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Solution

The fourth proportional to 105,178.05, 145,157.13 and 64,890.77 is: 89,556.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,178.05 : 145,157.13 = 64,890.77 : x
  2. Step 2: Convert to fraction form
    105,178.05/145,157.13 = 64,890.77/x
  3. Step 3: Cross multiply
    105,178.05x = 145,157.13 × 64,890.77
  4. Step 4: Simplify right side
    105,178.05x = 9,419,357,210.90
  5. Step 5: Solve for x
    x = 9,419,357,210.90/105,178.05
  6. Step 6: Final answer
    x = 89,556.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.