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Finding the Fourth Proportional to 65,818.12, 90,828.64 and 35,603.32

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Solution

The fourth proportional to 65,818.12, 90,828.64 and 35,603.32 is: 49,132.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,818.12 : 90,828.64 = 35,603.32 : x
  2. Step 2: Convert to fraction form
    65,818.12/90,828.64 = 35,603.32/x
  3. Step 3: Cross multiply
    65,818.12x = 90,828.64 × 35,603.32
  4. Step 4: Simplify right side
    65,818.12x = 3,233,801,135.08
  5. Step 5: Solve for x
    x = 3,233,801,135.08/65,818.12
  6. Step 6: Final answer
    x = 49,132.38

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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.