Home / 128,822.55-193,140.40-86,597.90

Finding the Fourth Proportional to 128,822.55, 193,140.40 and 86,597.90

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Solution

The fourth proportional to 128,822.55, 193,140.40 and 86,597.90 is: 129,834.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,822.55 : 193,140.40 = 86,597.90 : x
  2. Step 2: Convert to fraction form
    128,822.55/193,140.40 = 86,597.90/x
  3. Step 3: Cross multiply
    128,822.55x = 193,140.40 × 86,597.90
  4. Step 4: Simplify right side
    128,822.55x = 16,725,551,646.47
  5. Step 5: Solve for x
    x = 16,725,551,646.47/128,822.55
  6. Step 6: Final answer
    x = 129,834.04

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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.