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Finding the Fourth Proportional to 99,779.70, 149,669.55 and 88,115.70

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Solution

The fourth proportional to 99,779.70, 149,669.55 and 88,115.70 is: 132,173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,779.70 : 149,669.55 = 88,115.70 : x
  2. Step 2: Convert to fraction form
    99,779.70/149,669.55 = 88,115.70/x
  3. Step 3: Cross multiply
    99,779.70x = 149,669.55 × 88,115.70
  4. Step 4: Simplify right side
    99,779.70x = 13,188,237,166.94
  5. Step 5: Solve for x
    x = 13,188,237,166.94/99,779.70
  6. Step 6: Final answer
    x = 132,173.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.