Home / 120,290.63-165,994.19-66,572.45

Finding the Fourth Proportional to 120,290.63, 165,994.19 and 66,572.45

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Solution

The fourth proportional to 120,290.63, 165,994.19 and 66,572.45 is: 91,866.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,290.63 : 165,994.19 = 66,572.45 : x
  2. Step 2: Convert to fraction form
    120,290.63/165,994.19 = 66,572.45/x
  3. Step 3: Cross multiply
    120,290.63x = 165,994.19 × 66,572.45
  4. Step 4: Simplify right side
    120,290.63x = 11,050,639,581.20
  5. Step 5: Solve for x
    x = 11,050,639,581.20/120,290.63
  6. Step 6: Final answer
    x = 91,866.17

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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.