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Finding the Fourth Proportional to 105,702.64, 145,868.61 and 57,955.87

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Solution

The fourth proportional to 105,702.64, 145,868.61 and 57,955.87 is: 79,978.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,702.64 : 145,868.61 = 57,955.87 : x
  2. Step 2: Convert to fraction form
    105,702.64/145,868.61 = 57,955.87/x
  3. Step 3: Cross multiply
    105,702.64x = 145,868.61 × 57,955.87
  4. Step 4: Simplify right side
    105,702.64x = 8,453,942,198.24
  5. Step 5: Solve for x
    x = 8,453,942,198.24/105,702.64
  6. Step 6: Final answer
    x = 79,978.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.