Home / 129,632.40-178,899.64-75,921.50

Finding the Fourth Proportional to 129,632.40, 178,899.64 and 75,921.50

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Solution

The fourth proportional to 129,632.40, 178,899.64 and 75,921.50 is: 104,775.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,632.40 : 178,899.64 = 75,921.50 : x
  2. Step 2: Convert to fraction form
    129,632.40/178,899.64 = 75,921.50/x
  3. Step 3: Cross multiply
    129,632.40x = 178,899.64 × 75,921.50
  4. Step 4: Simplify right side
    129,632.40x = 13,582,329,275.71
  5. Step 5: Solve for x
    x = 13,582,329,275.71/129,632.40
  6. Step 6: Final answer
    x = 104,775.73

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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.