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Finding the Fourth Proportional to 65,712.28, 90,682.98 and 35,904.28

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Solution

The fourth proportional to 65,712.28, 90,682.98 and 35,904.28 is: 49,547.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,712.28 : 90,682.98 = 35,904.28 : x
  2. Step 2: Convert to fraction form
    65,712.28/90,682.98 = 35,904.28/x
  3. Step 3: Cross multiply
    65,712.28x = 90,682.98 × 35,904.28
  4. Step 4: Simplify right side
    65,712.28x = 3,255,907,105.15
  5. Step 5: Solve for x
    x = 3,255,907,105.15/65,712.28
  6. Step 6: Final answer
    x = 49,547.92

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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.