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Finding the Fourth Proportional to 119,780.28, 165,266.28 and 87,893.76

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Solution

The fourth proportional to 119,780.28, 165,266.28 and 87,893.76 is: 121,271.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,780.28 : 165,266.28 = 87,893.76 : x
  2. Step 2: Convert to fraction form
    119,780.28/165,266.28 = 87,893.76/x
  3. Step 3: Cross multiply
    119,780.28x = 165,266.28 × 87,893.76
  4. Step 4: Simplify right side
    119,780.28x = 14,525,874,750.41
  5. Step 5: Solve for x
    x = 14,525,874,750.41/119,780.28
  6. Step 6: Final answer
    x = 121,271.00

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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.