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Finding the Fourth Proportional to 65,809.64, 98,714.36 and 21,436.32

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Solution

The fourth proportional to 65,809.64, 98,714.36 and 21,436.32 is: 32,154.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,809.64 : 98,714.36 = 21,436.32 : x
  2. Step 2: Convert to fraction form
    65,809.64/98,714.36 = 21,436.32/x
  3. Step 3: Cross multiply
    65,809.64x = 98,714.36 × 21,436.32
  4. Step 4: Simplify right side
    65,809.64x = 2,116,072,609.56
  5. Step 5: Solve for x
    x = 2,116,072,609.56/65,809.64
  6. Step 6: Final answer
    x = 32,154.45

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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.