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Finding the Fourth Proportional to 65,779.49, 90,775.70 and 35,564.79

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Solution

The fourth proportional to 65,779.49, 90,775.70 and 35,564.79 is: 49,079.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,779.49 : 90,775.70 = 35,564.79 : x
  2. Step 2: Convert to fraction form
    65,779.49/90,775.70 = 35,564.79/x
  3. Step 3: Cross multiply
    65,779.49x = 90,775.70 × 35,564.79
  4. Step 4: Simplify right side
    65,779.49x = 3,228,418,529.78
  5. Step 5: Solve for x
    x = 3,228,418,529.78/65,779.49
  6. Step 6: Final answer
    x = 49,079.41

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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.