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Finding the Fourth Proportional to 128,713.08, 193,040.46 and 45,607.08

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Solution

The fourth proportional to 128,713.08, 193,040.46 and 45,607.08 is: 68,400.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,713.08 : 193,040.46 = 45,607.08 : x
  2. Step 2: Convert to fraction form
    128,713.08/193,040.46 = 45,607.08/x
  3. Step 3: Cross multiply
    128,713.08x = 193,040.46 × 45,607.08
  4. Step 4: Simplify right side
    128,713.08x = 8,804,011,702.46
  5. Step 5: Solve for x
    x = 8,804,011,702.46/128,713.08
  6. Step 6: Final answer
    x = 68,400.29

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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.