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Finding the Fourth Proportional to 65,782.87, 90,773.35 and 38,926.51

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Solution

The fourth proportional to 65,782.87, 90,773.35 and 38,926.51 is: 53,714.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,782.87 : 90,773.35 = 38,926.51 : x
  2. Step 2: Convert to fraction form
    65,782.87/90,773.35 = 38,926.51/x
  3. Step 3: Cross multiply
    65,782.87x = 90,773.35 × 38,926.51
  4. Step 4: Simplify right side
    65,782.87x = 3,533,489,392.26
  5. Step 5: Solve for x
    x = 3,533,489,392.26/65,782.87
  6. Step 6: Final answer
    x = 53,714.43

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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.