Home / 128,086.10-176,758.13-74,384.31

Finding the Fourth Proportional to 128,086.10, 176,758.13 and 74,384.31

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Solution

The fourth proportional to 128,086.10, 176,758.13 and 74,384.31 is: 102,649.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,086.10 : 176,758.13 = 74,384.31 : x
  2. Step 2: Convert to fraction form
    128,086.10/176,758.13 = 74,384.31/x
  3. Step 3: Cross multiply
    128,086.10x = 176,758.13 × 74,384.31
  4. Step 4: Simplify right side
    128,086.10x = 13,148,031,722.90
  5. Step 5: Solve for x
    x = 13,148,031,722.90/128,086.10
  6. Step 6: Final answer
    x = 102,649.95

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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.