Home / 100,486.04-138,672.35-55,168.21

Finding the Fourth Proportional to 100,486.04, 138,672.35 and 55,168.21

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Solution

The fourth proportional to 100,486.04, 138,672.35 and 55,168.21 is: 76,133.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,486.04 : 138,672.35 = 55,168.21 : x
  2. Step 2: Convert to fraction form
    100,486.04/138,672.35 = 55,168.21/x
  3. Step 3: Cross multiply
    100,486.04x = 138,672.35 × 55,168.21
  4. Step 4: Simplify right side
    100,486.04x = 7,650,306,130.71
  5. Step 5: Solve for x
    x = 7,650,306,130.71/100,486.04
  6. Step 6: Final answer
    x = 76,133.02

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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.