Home / 129,804.32-179,132.30-76,128.05

Finding the Fourth Proportional to 129,804.32, 179,132.30 and 76,128.05

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Solution

The fourth proportional to 129,804.32, 179,132.30 and 76,128.05 is: 105,058.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,804.32 : 179,132.30 = 76,128.05 : x
  2. Step 2: Convert to fraction form
    129,804.32/179,132.30 = 76,128.05/x
  3. Step 3: Cross multiply
    129,804.32x = 179,132.30 × 76,128.05
  4. Step 4: Simplify right side
    129,804.32x = 13,636,991,414.71
  5. Step 5: Solve for x
    x = 13,636,991,414.71/129,804.32
  6. Step 6: Final answer
    x = 105,058.07

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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.