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Finding the Fourth Proportional to 90,986.70, 136,415.42 and 34,779.46

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Solution

The fourth proportional to 90,986.70, 136,415.42 and 34,779.46 is: 52,144.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,986.70 : 136,415.42 = 34,779.46 : x
  2. Step 2: Convert to fraction form
    90,986.70/136,415.42 = 34,779.46/x
  3. Step 3: Cross multiply
    90,986.70x = 136,415.42 × 34,779.46
  4. Step 4: Simplify right side
    90,986.70x = 4,744,454,643.27
  5. Step 5: Solve for x
    x = 4,744,454,643.27/90,986.70
  6. Step 6: Final answer
    x = 52,144.49

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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.