Home / 130,649-180,290.40-76,936.28

Finding the Fourth Proportional to 130,649, 180,290.40 and 76,936.28

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Solution

The fourth proportional to 130,649, 180,290.40 and 76,936.28 is: 106,168.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,649 : 180,290.40 = 76,936.28 : x
  2. Step 2: Convert to fraction form
    130,649/180,290.40 = 76,936.28/x
  3. Step 3: Cross multiply
    130,649x = 180,290.40 × 76,936.28
  4. Step 4: Simplify right side
    130,649x = 13,870,872,695.71
  5. Step 5: Solve for x
    x = 13,870,872,695.71/130,649
  6. Step 6: Final answer
    x = 106,168.99

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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.