Home / 123,278.28-170,118-72,284.16

Finding the Fourth Proportional to 123,278.28, 170,118 and 72,284.16

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Solution

The fourth proportional to 123,278.28, 170,118 and 72,284.16 is: 99,748.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,278.28 : 170,118 = 72,284.16 : x
  2. Step 2: Convert to fraction form
    123,278.28/170,118 = 72,284.16/x
  3. Step 3: Cross multiply
    123,278.28x = 170,118 × 72,284.16
  4. Step 4: Simplify right side
    123,278.28x = 12,296,836,730.88
  5. Step 5: Solve for x
    x = 12,296,836,730.88/123,278.28
  6. Step 6: Final answer
    x = 99,748.61

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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.