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Finding the Fourth Proportional to 65,856.80, 90,960.72 and 52,473.44

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Solution

The fourth proportional to 65,856.80, 90,960.72 and 52,473.44 is: 72,475.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,856.80 : 90,960.72 = 52,473.44 : x
  2. Step 2: Convert to fraction form
    65,856.80/90,960.72 = 52,473.44/x
  3. Step 3: Cross multiply
    65,856.80x = 90,960.72 × 52,473.44
  4. Step 4: Simplify right side
    65,856.80x = 4,773,021,883.28
  5. Step 5: Solve for x
    x = 4,773,021,883.28/65,856.80
  6. Step 6: Final answer
    x = 72,475.76

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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.