Home / 100,137.15-138,184.80-54,817.04

Finding the Fourth Proportional to 100,137.15, 138,184.80 and 54,817.04

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Solution

The fourth proportional to 100,137.15, 138,184.80 and 54,817.04 is: 75,645.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,137.15 : 138,184.80 = 54,817.04 : x
  2. Step 2: Convert to fraction form
    100,137.15/138,184.80 = 54,817.04/x
  3. Step 3: Cross multiply
    100,137.15x = 138,184.80 × 54,817.04
  4. Step 4: Simplify right side
    100,137.15x = 7,574,881,018.07
  5. Step 5: Solve for x
    x = 7,574,881,018.07/100,137.15
  6. Step 6: Final answer
    x = 75,645.06

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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.