Home / 128,156.97-176,758.33-77,116.50

Finding the Fourth Proportional to 128,156.97, 176,758.33 and 77,116.50

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Solution

The fourth proportional to 128,156.97, 176,758.33 and 77,116.50 is: 106,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,156.97 : 176,758.33 = 77,116.50 : x
  2. Step 2: Convert to fraction form
    128,156.97/176,758.33 = 77,116.50/x
  3. Step 3: Cross multiply
    128,156.97x = 176,758.33 × 77,116.50
  4. Step 4: Simplify right side
    128,156.97x = 13,630,982,871.65
  5. Step 5: Solve for x
    x = 13,630,982,871.65/128,156.97
  6. Step 6: Final answer
    x = 106,361.62

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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.