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Finding the Fourth Proportional to 65,263.56, 97,890.12 and 20,878.32

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Solution

The fourth proportional to 65,263.56, 97,890.12 and 20,878.32 is: 31,315.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,263.56 : 97,890.12 = 20,878.32 : x
  2. Step 2: Convert to fraction form
    65,263.56/97,890.12 = 20,878.32/x
  3. Step 3: Cross multiply
    65,263.56x = 97,890.12 × 20,878.32
  4. Step 4: Simplify right side
    65,263.56x = 2,043,781,250.20
  5. Step 5: Solve for x
    x = 2,043,781,250.20/65,263.56
  6. Step 6: Final answer
    x = 31,315.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.