Home / 138,603.40-191,272.78-74,941.18

Finding the Fourth Proportional to 138,603.40, 191,272.78 and 74,941.18

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Solution

The fourth proportional to 138,603.40, 191,272.78 and 74,941.18 is: 103,418.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,603.40 : 191,272.78 = 74,941.18 : x
  2. Step 2: Convert to fraction form
    138,603.40/191,272.78 = 74,941.18/x
  3. Step 3: Cross multiply
    138,603.40x = 191,272.78 × 74,941.18
  4. Step 4: Simplify right side
    138,603.40x = 14,334,207,835.08
  5. Step 5: Solve for x
    x = 14,334,207,835.08/138,603.40
  6. Step 6: Final answer
    x = 103,418.88

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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.