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Finding the Fourth Proportional to 128,957.37, 193,347.82 and 65,655.00

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Solution

The fourth proportional to 128,957.37, 193,347.82 and 65,655.00 is: 98,437.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,957.37 : 193,347.82 = 65,655.00 : x
  2. Step 2: Convert to fraction form
    128,957.37/193,347.82 = 65,655.00/x
  3. Step 3: Cross multiply
    128,957.37x = 193,347.82 × 65,655.00
  4. Step 4: Simplify right side
    128,957.37x = 12,694,249,991.22
  5. Step 5: Solve for x
    x = 12,694,249,991.22/128,957.37
  6. Step 6: Final answer
    x = 98,437.57

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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.