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Finding the Fourth Proportional to 65,728.32, 98,616.84 and 47,156.64

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Solution

The fourth proportional to 65,728.32, 98,616.84 and 47,156.64 is: 70,752.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,728.32 : 98,616.84 = 47,156.64 : x
  2. Step 2: Convert to fraction form
    65,728.32/98,616.84 = 47,156.64/x
  3. Step 3: Cross multiply
    65,728.32x = 98,616.84 × 47,156.64
  4. Step 4: Simplify right side
    65,728.32x = 4,650,438,821.82
  5. Step 5: Solve for x
    x = 4,650,438,821.82/65,728.32
  6. Step 6: Final answer
    x = 70,752.44

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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.