Home / 128,968.40-193,559.20-65,835.16

Finding the Fourth Proportional to 128,968.40, 193,559.20 and 65,835.16

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Solution

The fourth proportional to 128,968.40, 193,559.20 and 65,835.16 is: 98,807.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,968.40 : 193,559.20 = 65,835.16 : x
  2. Step 2: Convert to fraction form
    128,968.40/193,559.20 = 65,835.16/x
  3. Step 3: Cross multiply
    128,968.40x = 193,559.20 × 65,835.16
  4. Step 4: Simplify right side
    128,968.40x = 12,743,000,901.47
  5. Step 5: Solve for x
    x = 12,743,000,901.47/128,968.40
  6. Step 6: Final answer
    x = 98,807.16

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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.