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Finding the Fourth Proportional to 120,207.52, 165,830.52 and 77,779.76

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Solution

The fourth proportional to 120,207.52, 165,830.52 and 77,779.76 is: 107,299.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,207.52 : 165,830.52 = 77,779.76 : x
  2. Step 2: Convert to fraction form
    120,207.52/165,830.52 = 77,779.76/x
  3. Step 3: Cross multiply
    120,207.52x = 165,830.52 × 77,779.76
  4. Step 4: Simplify right side
    120,207.52x = 12,898,258,046.28
  5. Step 5: Solve for x
    x = 12,898,258,046.28/120,207.52
  6. Step 6: Final answer
    x = 107,299.93

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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.