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Finding the Fourth Proportional to 65,711.28, 90,681.60 and 35,903.28

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Solution

The fourth proportional to 65,711.28, 90,681.60 and 35,903.28 is: 49,546.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,711.28 : 90,681.60 = 35,903.28 : x
  2. Step 2: Convert to fraction form
    65,711.28/90,681.60 = 35,903.28/x
  3. Step 3: Cross multiply
    65,711.28x = 90,681.60 × 35,903.28
  4. Step 4: Simplify right side
    65,711.28x = 3,255,766,875.65
  5. Step 5: Solve for x
    x = 3,255,766,875.65/65,711.28
  6. Step 6: Final answer
    x = 49,546.54

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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.