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Finding the Fourth Proportional to 127,307.64, 175,611.46 and 79,477.95

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Solution

The fourth proportional to 127,307.64, 175,611.46 and 79,477.95 is: 109,633.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,307.64 : 175,611.46 = 79,477.95 : x
  2. Step 2: Convert to fraction form
    127,307.64/175,611.46 = 79,477.95/x
  3. Step 3: Cross multiply
    127,307.64x = 175,611.46 × 79,477.95
  4. Step 4: Simplify right side
    127,307.64x = 13,957,238,439.92
  5. Step 5: Solve for x
    x = 13,957,238,439.92/127,307.64
  6. Step 6: Final answer
    x = 109,633.94

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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.