Home / 120,128.29-165,762.47-66,405.85

Finding the Fourth Proportional to 120,128.29, 165,762.47 and 66,405.85

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Solution

The fourth proportional to 120,128.29, 165,762.47 and 66,405.85 is: 91,632.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,128.29 : 165,762.47 = 66,405.85 : x
  2. Step 2: Convert to fraction form
    120,128.29/165,762.47 = 66,405.85/x
  3. Step 3: Cross multiply
    120,128.29x = 165,762.47 × 66,405.85
  4. Step 4: Simplify right side
    120,128.29x = 11,007,597,718.45
  5. Step 5: Solve for x
    x = 11,007,597,718.45/120,128.29
  6. Step 6: Final answer
    x = 91,632.02

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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.