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Finding the Fourth Proportional to 65,686.25, 90,647.16 and 35,878.25

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Solution

The fourth proportional to 65,686.25, 90,647.16 and 35,878.25 is: 49,512.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,686.25 : 90,647.16 = 35,878.25 : x
  2. Step 2: Convert to fraction form
    65,686.25/90,647.16 = 35,878.25/x
  3. Step 3: Cross multiply
    65,686.25x = 90,647.16 × 35,878.25
  4. Step 4: Simplify right side
    65,686.25x = 3,252,261,468.27
  5. Step 5: Solve for x
    x = 3,252,261,468.27/65,686.25
  6. Step 6: Final answer
    x = 49,512.06

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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.