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Finding the Fourth Proportional to 130,913.68, 180,659.72 and 79,915.68

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Solution

The fourth proportional to 130,913.68, 180,659.72 and 79,915.68 is: 110,282.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,913.68 : 180,659.72 = 79,915.68 : x
  2. Step 2: Convert to fraction form
    130,913.68/180,659.72 = 79,915.68/x
  3. Step 3: Cross multiply
    130,913.68x = 180,659.72 × 79,915.68
  4. Step 4: Simplify right side
    130,913.68x = 14,437,544,372.41
  5. Step 5: Solve for x
    x = 14,437,544,372.41/130,913.68
  6. Step 6: Final answer
    x = 110,282.93

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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.