Home / 128,106.32-176,846.34-74,380.64

Finding the Fourth Proportional to 128,106.32, 176,846.34 and 74,380.64

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Solution

The fourth proportional to 128,106.32, 176,846.34 and 74,380.64 is: 102,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,106.32 : 176,846.34 = 74,380.64 : x
  2. Step 2: Convert to fraction form
    128,106.32/176,846.34 = 74,380.64/x
  3. Step 3: Cross multiply
    128,106.32x = 176,846.34 × 74,380.64
  4. Step 4: Simplify right side
    128,106.32x = 13,153,943,950.86
  5. Step 5: Solve for x
    x = 13,153,943,950.86/128,106.32
  6. Step 6: Final answer
    x = 102,679.90

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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.