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Finding the Fourth Proportional to 65,779.47, 90,774.32 and 35,971.47

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Solution

The fourth proportional to 65,779.47, 90,774.32 and 35,971.47 is: 49,639.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,779.47 : 90,774.32 = 35,971.47 : x
  2. Step 2: Convert to fraction form
    65,779.47/90,774.32 = 35,971.47/x
  3. Step 3: Cross multiply
    65,779.47x = 90,774.32 × 35,971.47
  4. Step 4: Simplify right side
    65,779.47x = 3,265,285,548.79
  5. Step 5: Solve for x
    x = 3,265,285,548.79/65,779.47
  6. Step 6: Final answer
    x = 49,639.89

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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.