Home / 100,125.24-138,172.47-54,184.79

Finding the Fourth Proportional to 100,125.24, 138,172.47 and 54,184.79

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Solution

The fourth proportional to 100,125.24, 138,172.47 and 54,184.79 is: 74,774.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,125.24 : 138,172.47 = 54,184.79 : x
  2. Step 2: Convert to fraction form
    100,125.24/138,172.47 = 54,184.79/x
  3. Step 3: Cross multiply
    100,125.24x = 138,172.47 × 54,184.79
  4. Step 4: Simplify right side
    100,125.24x = 7,486,845,999.81
  5. Step 5: Solve for x
    x = 7,486,845,999.81/100,125.24
  6. Step 6: Final answer
    x = 74,774.81

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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.