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Finding the Fourth Proportional to 65,779.72, 90,774.66 and 35,971.72

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Solution

The fourth proportional to 65,779.72, 90,774.66 and 35,971.72 is: 49,640.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,779.72 : 90,774.66 = 35,971.72 : x
  2. Step 2: Convert to fraction form
    65,779.72/90,774.66 = 35,971.72/x
  3. Step 3: Cross multiply
    65,779.72x = 90,774.66 × 35,971.72
  4. Step 4: Simplify right side
    65,779.72x = 3,265,320,652.62
  5. Step 5: Solve for x
    x = 3,265,320,652.62/65,779.72
  6. Step 6: Final answer
    x = 49,640.23

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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.