Home / 138,029.67-190,479.12-76,775.45

Finding the Fourth Proportional to 138,029.67, 190,479.12 and 76,775.45

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Solution

The fourth proportional to 138,029.67, 190,479.12 and 76,775.45 is: 105,949.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,029.67 : 190,479.12 = 76,775.45 : x
  2. Step 2: Convert to fraction form
    138,029.67/190,479.12 = 76,775.45/x
  3. Step 3: Cross multiply
    138,029.67x = 190,479.12 × 76,775.45
  4. Step 4: Simplify right side
    138,029.67x = 14,624,119,201.21
  5. Step 5: Solve for x
    x = 14,624,119,201.21/138,029.67
  6. Step 6: Final answer
    x = 105,949.10

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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.