Home / 128,772.21-193,211.46-69,538.13

Finding the Fourth Proportional to 128,772.21, 193,211.46 and 69,538.13

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Solution

The fourth proportional to 128,772.21, 193,211.46 and 69,538.13 is: 104,335.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,772.21 : 193,211.46 = 69,538.13 : x
  2. Step 2: Convert to fraction form
    128,772.21/193,211.46 = 69,538.13/x
  3. Step 3: Cross multiply
    128,772.21x = 193,211.46 × 69,538.13
  4. Step 4: Simplify right side
    128,772.21x = 13,435,563,622.97
  5. Step 5: Solve for x
    x = 13,435,563,622.97/128,772.21
  6. Step 6: Final answer
    x = 104,335.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.