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Finding the Fourth Proportional to 132,638.98, 183,013.41 and 78,913.50

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Solution

The fourth proportional to 132,638.98, 183,013.41 and 78,913.50 is: 108,883.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,638.98 : 183,013.41 = 78,913.50 : x
  2. Step 2: Convert to fraction form
    132,638.98/183,013.41 = 78,913.50/x
  3. Step 3: Cross multiply
    132,638.98x = 183,013.41 × 78,913.50
  4. Step 4: Simplify right side
    132,638.98x = 14,442,228,730.04
  5. Step 5: Solve for x
    x = 14,442,228,730.04/132,638.98
  6. Step 6: Final answer
    x = 108,883.74

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1.5x scale

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.